Need Help? 1(866)388-7558  

My Cart:

0 item(s) - $0.00
You have no items in your shopping cart.

MRO Stop Blog

  • Meet - Bill Pettus

    Meet - Meet Our Employees!

    Bill Pettus







    Occupation: President

    Favorite Food: Anything with spice (Mexican food especially!!)

    Hobbies: Family, Jogging, Website development

    Favorite Quote: "All our dreams can come true, if we have the courage to pursue them" - Walt Disney

    Pet Peeve: Accountability (apparently it's a limited resource)

    Favorite Color: Blue

    Nickname: Computer Nerd (I see it as badge of honor now… lol)

    Favorite Album of All Time: One - Metallica

    Pets: Rockey (Dog), Casey (Dog), Kitty (Cat…real original, I know…lol)

    If You Could Be Anything, What Would You Be: a positive influence to others

  • NEW Parker Brass Ball Valves at

    Parker forged body ball valves provide extended service life and resists failure caused by severe temperature applications. Optimum flow design assures maximum system efficiency. Highly inert PTFE seats and seals provide resistance to chemical corrosion. Parker also provides a blow-out proof stem, chrome plated brass ball and a specially designed handle enabling increased turning leverage for ease of opening and closing. Parker’s brass ball valves can be readily identified assuring high quality engineering and reliability.

    Buy Parker Brass Ball Valves at

    The industrial ball valve product line is intended for general purpose use. Please be aware that ball valves are intended for use in the fully open or closed positions.

    1/4" - 2"
    Working Pressure
    29in. Hg Vacuum to 600 PSI
    (Vented, 250 PSI)
    150 PSI saturated steam
    Temperature Range
    0º to +250ºF

  • Graco Husky Diaphragm Pumps at

    Graco's air-operated double diaphragm pumps are ideal for a wide range of applications, including corrosive and abrasive fluid transfer.  These Husky model pumps feature a patented air valve design with a three-way pilot valve for true non-sticking operation.  They are offered in a variety of different materials and connection sizes.  Here's a quick overview of some of the most common models.

    Husky 515 -  1/2" Double Diaphragm Pump

    The Husky 515 operates on as little as 20 psi (1.4 bar, 0.14 MPa) and is available in groundable acetal, polypropylene and PVDF materials of construction.


    • Fully-groundable acetal model
    • Delivery up to 7 gpm (26.5 lpm)
    • Easy-to-service air valve and ball checks
    • Reliable air valve for years of dependable performance

    Purchase Graco Husky 515 Pumps Here!

    Husky 716 - 3/4" Double Diaphragm Pump
    This 3/4-inch pump has an external controller for remote control capabilities and is available in aluminum and 316 stainless steel construction.
    • 3/4 in (19.05 mm) center- and end-porting
    • No seals to leak or fail
    • Quiet running less than 85 dBa with easy-to-use remote muffler capability for even lower noise levels
    • Easy-to-service air valve and ball checks

      Husky 1050 - 1" Double Diaphragm Pump
                Our new 1 inch double diaphragm pump features a stall-free, low pulsation air valve   which provides a smooth and rapid changeover. Available in aluminum, polypropylene, conductive polypropylene, PVDF, stainless steel and hastelloy fluid sections.
     Use the HUSKY 1050 SELECTOR TOOL to choose the right pump for your application!
    • Gold winner in the 2010 Plant Engineering Product of the Year contest!
    • 30% more efficient than the market leader
    • 20% increase in fluid flow compared to the Husky 1040
    • Up to 5 times longer diaphragm life compared to other double diaphragm pumps in its class
    • Expanded material offering to handle endless applications

    Purchase Graco Husky 1050 Pumps Here!

    Husky 1590 - 1-1/2" Double Diaphragm Pump
     This 1-1/2 inch pump offers a patented, high-reliability closed center air valve that is online serviceable and an epoxy-coated air section for tough environmental conditions.
    • 1-1/2 in. (38.1 mm) ANSI end-porting
    • High flow - 100 gpm (378 lpm) in a compact, portable size
    • Fluid pressure to 120 psi (8.4 bar, 0.84 MPa)
    • Lube-free operation
    • Available in polypropylene, kynar, aluminum and stainless steel.
    • Epoxy-coated air section for tough environmental conditions
    Husky 2150 - 2" Double Diaphragm Pump
     This 2-inch pump offers larger ports for increased flow. Available in aluminum, 316 stainless steel, ductile iron, polypropylene and PVDF.
    • 2 in (51 mm) ANSI end-porting
    • Fluid flow up to 150 gpm (568 lpm)
    • Fluid pressure to 120 psi (8.4 bar, 0.84 MPa)
    • Lube-free operation
    • Epoxy-coated air section for tough environmental conditions
    • 5-year warranty on wetted parts and 15-year warranty on center sections
    Husky 3275 - 3" Double Diaphragm Pump
     This 3-inch pump has bolted leak-free flanged connections and is available in aluminum construction.
    • 3 in (76.2 mm) ANSI center-porting
    • Fluid flow up to 275 gpm (1040 lpm)
    • Large flow paths for handling high viscosities
    • Easy air valve maintenance
    • Heavy-duty construction
    • Epoxy-coated air section for tough environmental conditions

    Purchase Husky 3275 Pumps Here!

  • features Graco Air Powered Hydra-Clean® Pressure Washers

    Designed with Graco’s new NXT Air Motor, Hydra-Clean® pressure washers are ideal for food processing facilities, heavy duty cleaning and maintenance, shipyards, oil rigs and other industrial applications.  Air-operation makes them great for hazardous or confined areas.  These high sanitation cleaning packages support multiple guns, and are available in wall or cart mount packages.  Designed for rugged dependability, pneumatically-driven pumps offer simplicity in design, operation and maintenance.  They provide high pressure for water and cleaning chemicals up to 3,000 psi and flow rates up to 9 gpm.  Graco's Hydra-Clean® pressure washers fit most pressure, flow and material requirements.

    Courtesy of PneumaticEquipment, here's a helpful YouTube video on how to set up and operate cart mounted Hydra-Clean pressure washers!

    Follow these links to view the Hydra-Clean Product Brochure, and the Hydra-Clean Manual and Spare Parts List.

    Click here to Purchase Cart or Wall Mounted Pressure Washer Packages.

  •'s Guide to Industrial Hose Selection

    Acronym to Guide in Hose Selection

    How To Select a Hose

    Several things must be known before the proper hose can be selected for any hose application. The acronym STAMPED can be the key to having the required information in most cases.

    SIZEThe appropriate inside and outside diameters and length of the hose should be determined.

    TEMPERATUREThe maximum temperature of the material being conveyed, and external temperature.

    APPLICATIONExternal conditions including abrasion, climate, heat, flexing, crushing, kinking and degrees of  bending.

    MATERIALThe composition of the substance being conveyed and compatibility with the hose.

    PRESSUREThe maximum pressure of the system, including pressure spikes.

    ENDSThe appropriate end connections and attachment method for the application.

    DELIVERYTesting, quality, packaging and delivery requirements.

    Complicated applications or an application requiring special made-to-order hose may require more detailed information.


    Once the basic needs for your application have been identified, view Parker's Industrial Hose Catalog here to see more specific product details, and choose a part #.



  •'s Guide to Mitsubishi VFDs

    Mitsubishi VFD Overview

    this lens' photo

    Mitsubishi VFDs achieve high precision and fast responses that exceed the performance of conventional general-purpose inverters. Mitsubishi VFD's can be used in specialized applications such as line control and elevators. By incorporating our original all-digital vector control, high starting torque and high speed response have been made possible for both velocity and torque control modes. The following is a run-down of currently available products.

    Mitsubishi A700 VFD

    Mitsubishi A700 VFDThe Mitsubishi A700 VFD is a high performance drive that replaces the popular A500(L) series. The Mitsubishi A700 VFD features many of the special technologies originally developed for Mitsubishi Electric servo drive products, such as adaptive auto-tuning that automatically compensates for changes in load inertia. The result is smoother operation, less downtime and ultimately, lower operating costs. Control modes include Velocity, Torque and Positioning. Real Sensorless Vector allows Zero speed holding torque and torque control without the need for an encoder. Mitsubishi's 'Real Sensorless Vector' or RSV motor control system provides unequalled dynamic performance, ensuring a wider speed range, smoother operation and lower motor currents than ever before. RSV starts with a highly accurate motor 'map', obtained during an auto-tune procedure which applies alternating voltage to the motor and determines critical motor characteristics. At the heart of RSV is the Adaptive Flux Observer system which compares actual motor behavior during operation with the theoretical model. Instead of a response to a change in load or speed being fixed, any variations between the theoretical and the actual motor response measured in operation are analyzed by the Flux Observer, which constantly refines the motor map as speed and load conditions change.- Wide Speed Range: 200:1 operating range is possible - even when the drive is used 'open loop'
    - PLC Feature: A700 programmability provides true intelligence inside the drive - a simple solution for complex applications
    - Easy Gain Tuning: Compensates automatically for changes in load inertia to ensure smooth and consistent operation
    - Fast Response: Up to 300 radians / second speed response means lightning fast reaction to sudden load changes
    - USB Port: Allows simple connection to the new FR-Configurator Software for quick and easy commissioning
    - Power Down Braking: Keeps the motor under control even if the supply power is lost
    - Remote I / O Capability: All of the drive I/O can be read or controlled over a network
    - Brake Transistor Circuit: Included in all sizes up to 30 Hp
    - Integral Radio Filter: Limits Radio Noise emissions to meet EU Directive - all sizes of drive
    - Speed Control: with or without torque limit allows 200:1 Speed range, driving or overhaulingOpen Loop Torque Control: including torque at zero speed
    - UL Listed for single-phase input

    Mitsubishi D700 VFD

    Mitsubishi D700 VFDThe Mitsubishi D700 VFD is the Low Cost direct replacement for the S500 & S500E Variable Frequency Drives and includes the following improvements:- Improved speed range. 150% or more motor torque is now possible at 1 Hz using General Purpose Magnetic Flux Vector control, giving a smooth open loop speed range of 60:1.
    - More interoperability. The D700 communications include Modbus RTU as well as Mitsubishi Electric's own RS 485 programming protocol (supported as standard).
    - Remote operation. Drive I/O can be remotely operated over any supported network, regardless of what the drive is doing.
    - Easy mounting. In smaller panel spaces, the D700 can be "bookshelf' mounted without a gap in between, and DIN Rail mounting is also possible.
    100kA fault-withstand rating simplifies panel construction.
    - Safety Stop Function. The D700 comes standard with a safety stop circuit allowing the removal of a previously required external contactor and is EN951-1 Category 3 and IEC60204-1 Stop Category 0 compliant.
    - RoHS compliant. Approved for installation on Europe-bound machines.
    - High accuracy. Analog inputs/outputs provide master/slave control.
    - "Maintenance free." Intelligent fan control, fewer moving parts, more robust bus capacitors and custom-made intelligent power modules are all designed to have a 10-year operating life so that users can install the D700 and forget it.

    Mitsubishi E700 VFD

    Mitsubishi E700 VFDThe Mitsubishi E700 VFD is the latest generation of Mitsubishi Electric's Micro Sized Variable Frequency Drives. The Mitsubishi E700 VFD replaces the popular E500 VFD and utilizes the same mounting foot print. Advanced features and functions such as USB port for commissioning and monitoring, embedded M-dial and display, increased low speed performance and the ability to install one of the many 700 VFD option cards allows the E700 to be used in the most demanding applications. With a standard 5 year warranty, quality and reliability is essentially guaranteed. The Mitsubishi E700 VFD promises to continue Mitsubishi's long history of providing the best micro drive in the industry.Simple to Use- Standard M-dial and display makes setup and monitoring easy
    - USB port allows setup & troubleshooting via PC
    - RJ45 port supports optional alpha numeric keypadAdaptable- Removable control I/O card simplifies wiring
    - Connection to various networks possible using option card
    - Increased I/O possible with installed option card
    - Special I/O cards tailored to meet specific applications

    Simple to Maintain

    - 10 year maintenance free design life
    - Self diagnostic warnings for key internal components
    - Easy to replace cooling fan requiring no tools


    - UL / cUL / CE approved
    - RoHS compliant
    - Approved at 100K Symmetrical Amps


    - Available in 240V and 480V up to 20HP
    - Available in 115V up to 1HP
    - Advanced Magnetic Flux Vector Control for improved starting torque and smooth low speed motor operation
    - Auto-tuning allows improved performance using virtually any manufacturer's motor
    - All capacities include built-in brake chopper
    - USB communications allow fast commissioning and troubleshooting
    - Standard RS485 serial communications supporting Modbus® RTU
    - Sink / Source selectable I/O
    - Supports remote I/O function via network
    - Built-in PID Control
    - Delivers rated current at 50°C and 14.5kHz carrier frequency with minimal de-rating
    - 200% overload for 3 seconds
    - 0 to 10V analog output
    - CC-Link®, DeviceNet%u2122, Profibus-DP, LonWorks®
    - Standard 5 year warranty

    Mitsubishi F700 VFD

    Mitsubishi  F700 VFDThe specifications of the Mitsubishi F700 VFD make this VFD from Mitsubishi Electric an absolute must for your drive systems. The Mitsubishi F700 inverter is built to optimize 3-phase motor control, saving energy for virtually all general purpose applications.PRODUCT FEATURES:- Programmable Timer: Generates a signal dependent on drive operating time - useful to plan scheduled machine maintenance.
    - Independent RS-485 Connections: Allow serial communications and keypad operation at the same time with no options needed. F700 supports Modbus RTU as well as the standard Mitsubishi Electric protocol.
    - Complies with Global Standards: UL, cUL, GOST, JEM, and CE marked for use in Europe. A radio filter is included in the drive as standard to meet European EMC levels (2nd Enviromental).
    - Improved Field Bus Capability: Now includes Profibus DP, Lon Works, CC-Link, DeviceNet, Metasys N2 and Siemens FLN.
    - Overvoltage Avoidance: The F700 measures DC bus levels when decelerating and controls drive speed to eliminate nuisance tripping.
    - Windmill Start: F700 measures residual motor slot ripple to determine both the speed and direction of rotation of a coasting motor and can swiftly and smoothly bring it under control when required - whichever way it's spinning.
    - Enhanced Energy Savings: An improved version of Mitsubishi Electric's famous energyoptimization software boosts motor efficiency to unprecedented levels and intelligently maximizes energy savings.
    - UL Type 1, Plenum Rated, Enclosure Designs (NEMA 1): Drive can be mounted as a stand-alone unit. Single Phase Input: UL/cUL Listed for use with Single Phase Input supply.
    - Ease of Programming: Taken to higher levels with the new DU07 programming dial and FR-Configurator programming software.

    Purchase Your Mitsubishi VFDs

    Mitsubishi A700 VFD
    Buy Mitsubishi A700 VFD and Accessories from
    Mitsubishi D700 VFD
    Buy Mitsubishi D700 VFD and Accessories from
    Mitsubishi E700 VFD
    Buy Mitsubishi E700 VFD and Accessories from
    Mitsubishi F700 VFD
    Buy Mitsubishi F700 VFD and Accessories from

  • Precautions with Firestone Marsh Mellow™ Springs

    Firestone standard industrial Marsh Mellow™ springs have an operating range of -40°F to 135°F (-40°C to 57°C).
    The upper limit is defined by the actual rubber temperature during operation.  High frequency inputs
    or large deflections will cause the rubber temperature to increase.

    Design Envelope
    Adequate clearance should be provided around the Marsh Mellow spring to prevent rubbing of the outer
    cover.  The outside diameter of the spring at various heights is listed in the table of dynamic characteristics
    on each individual data page.

    Shielding should be used to protect the rubber from exposure to hot metal, petroleum base fluids, acids,
    etc.  Please consult Firestone Industrial Products if you wish to know how the spring will withstand a
    specific contaminate.  (For liquids such as acids, it is important to know both concentration and

    The best storage environment is a dark, dry area at normal room temperature.

    Percent Compression
    The general compression range of a Marsh Mellow spring is 15% to 27%, however this value may vary
    somewhat among springs and applications. Always follow the load ranges and their corresponding
    compression percentages as shown in the selection guide.

    Allowable Stroke
    When applying a Marsh Mellow spring, the stroke throughout the range of motion of the machine being
    isolated must be considered.  Delta strain, defined as the ratio of the stroke to the free length, is restricted
    to less than 7.5%.

    Note that a given stroke is typical of vibrating screen types of applications, where the stroke is designed into
    the system.  In other isolation applications, this stroke may not be known. The stroke is typically not
    excessive in standard isolation applications, but should be considered. Consult Firestone for

    Disturbing Frequency Range
    Marsh Mellow springs are suitable for disturbing frequencies in the 800-1200 CPM (13-20Hz) range
    or medium stroke applications.  High frequency, high stroke applications may lead to overheating the Marsh
    Mellow spring.  Low stroke applications, however, are capable of handling higher disturbing frequencies.
    Please consult Firestone Industrial Products for assistance.

    Lateral Stability
    The lateral spring rate to load ratio for a Marsh Mellow spring decreases as deflection increases.  This is one reason it is important not to exceed the given load capabilities.

    Center of Gravity
    A Marsh Mellow™ spring isolation system is inherently soft (easily deflected); therefore, precautions must be
    taken to insure that the system is stable. First consider the location of the center of gravity (CG). Ideally, Marsh
    Mellow springs should be located on the same plane (parallel to the ground) as the center of gravity. Where
    this is not possible, follow this guideline: The distance between the narrowest mounting points should be at
    least twice the height of the center of gravity.

    In the above example, the most narrow distance between two Marsh Mellow springs is 46 inches
    (117 cm). The height to the CG is 48 inches (122 cm); therefore, this system does not meet Firestone's guidelines.  Two possible solutions would be:

    1. Increase the base dimensions to meet Firestone guidelines
    by increasing both the width and length to at least 48 x 2 or 96 inches (122 x 2 or 244 cm).
    2. Locate the Marsh Mellow Spring at the CG as shown below.

    Startup and Shutdown / Resonance and Amplification
    Resonance is the condition where the forced frequency of the vibrating system is equal to the
    natural frequency of the suspension. When this happens, amplification of movement occurs. If the
    normal stroke of a vibrating screen, for example, is 5/16 of an inch (8 mm), during startup and shutdown
    (as the machine goes through resonance), the amplitude of movement will be multiplied. So while
    the machine is accelerating to normal operating speed and decelerating during shutdown, the stroke may be
    amplified in the range of 1⁄2 (12 mm) to 11⁄2 (38 mm) inches. The longer the machine takes to go through
    resonance (to speed up to, or slow down from full operating speed), the larger the amplitude of
    movement. Note that in some applications, the addition of viscous or friction dampers may be
    required to reduce the amplitude of motion during startup and shutdown.

    Isolating an Unbalanced Mass
    The primary concern in this case is the amplitude of movement. It is dependent on:
    1. The ratio of the unbalanced moving mass to the total suspended mass.
    2. The ratio of the speed of the unbalanced moving mass (forced frequency) to the natural frequency
    of the Marsh Mellow spring and supported mass system.
    The addition of damping to the isolation system (“shock absorbers”) will reduce the large amplitude
    of movement experienced during resonance. If the amplitude of movement is too great, one
    possible solution would be to add a static inertia base in order to increase the ratio of the total suspended
    mass to the moving unbalanced mass. A good “rule of thumb” is 10:1, respectively.

  • Identify Current Graco Part #s for Old Lubriquip Items

    Graco Products at




    Up until 2006, Lubriquip was a leading manufacturer of centralized and automated oil and grease lubrication systems, force-feed lubricators, metering devices and related electronic controls and accessories. The company served diverse applications in machine tools, transfer machines, conveyors, packaging machinery, transportation equipment, construction machinery, mobile on-road vehicles, rail applications, food processing and paper machinery.

    In 2006 however, Lubriquip was purchased by another long-time leader in the lubrication industry, Graco Inc.  During the transition, many of Lubriquip's  products were assigned new part #s.  Fortunately, a simple cross-reference tool has been provided to identify the new part #s.  Click Here to Cross-Reference Lubriquip Part #s with Current Graco #s.

    Purchase Former Lubriquip Items, and other Graco Products Here

  • Schroeder Filter Element Cross-Reference Tool

    Schroeder BestFit Filter Elements at MROStop.comSchroeder manufactures over 1,900 BestFit® Performance Replacement elements designed to provide better filtration than the competitive elements they replace. The BestFit® family consists of standard elements (synthetic, cellulose, metal, and water removal media), Corecentric® Coreless repair elements, and SchroederSpun™ process filtration elements, as well as air breathers and strainers. Styles include both cartridge and spin-on.

    Cross a competitor's element to a Schroeder BestFit® element with the click of a button!  Schroeder Element Cross-Reference

    Once you've generated a part #, purchase your Schroeder BestFit element at MRO Stop!

  • MROstop's guide to Mitsubishi GOT1000 HMIs

    What is the Mitsubishi GOT1000?

    this lens' photo

    The GOT1000 platform is an all new and evolutionary family of high performance Graphical Operator Terminals (GOT). This new platform combines the best in performance, graphics and functionality in a unique, ultra compact and robust package. This platform is divided into two classes of HMI - Basic and Advanced. Basic models offer a long list of features and functions commonly found in many small standalone systems and applications. Advanced models,add increased innovation and functionality, flexibility and networking capabilities to address the needs of larger, more complex systems. The GOT1000 platform of HMIs offers a wide selection of display types (TFT and STN), sizes (ranging from 5.7" to 15") and formats (available in both panel mount and pendant style) to not only meet but exceed your application requirement.

    Mitsubishi GT10 HMI

    The GT10 Series is Mitsubishi's entry level GOT. Models in this range are the smallest and most compact terminals in the lineup. Ideal for many standalone machine level applications these models feature a host of high-end functions desirable by many machine builders and users. Unique to the GT10 are models that offer a programmable multicolor backlit display that can easily communicate machine status to any type operator. Display options include monochrome and color STN and range in size from 3.5 inch to 5.7 inches.
    Common hardware features for the GT10 include an integrated communication ports (RS232 or RS422), power supply and rear mounted USB port is available for some models. Onboard flash memory ranges from 512kb to 3MB with terminals in this range.

    Mitsubishi GT11 HMI

    The GT11 Series is Mitsubishi's mid level GOT HMI. Models in this range offer basic HMI functionality in a 6" package. Ideal for many standalone machine level applications these models build on the functionality found in the GT10 Series and add enhancements like scripting, animation and removable memory access (compact flash). GT11 is available in panel mount or pendent style configurations and offers several display options including monochrome, color STN and color TFT.
    Common hardware features for the GT11 include an enhanced CPU, integrated communication ports (RS232/422) and power supply, front mounted USB port, compact flash slot, and 3MB onboard flash memory.

    Mitsubishi GT15 HMI

    The GT15 Series GOT is Mitsubishi's advanced GOT. Models in this range offer many of the features found in the GT16 Series. Ideal for many standalone or networked solutions, the GT15 delivers visualization for machine, factory and enterprise level applications. Designed to meet the rigors of today's factory, the GT15 Series is a HMI workhorse and well suited for demanding applications and environments alike. Terminals in this range are available in color or monochrome TFT or STN display and range in size from 5.7 inch to 15 inch.
    Common hardware features for the GT15 include an enhanced CPU and graphics engine, integrated communication ports (RS232) and power supply, front mounted USB ports, compact flash slots, and 9MB flash memory built-in.

    Mitsubishi GT16 HMI

    The GT16 Series is Mitsubishi's new flagship Graphic Operation Terminal (GOT). Models in this range offer a comprehensive feature set in an integrated HMI hardware package. Ideal for any standalone or networked solutions, the GT16 easily delivers visualization for machine, factory and enterprise level applications. Unmatched in performance, the GT16 integrates both multimedia and HMI functionality in a single platform to rival the traditional PC. Unique to GT16 and GT15 Series are an assortment of embedded maintenance functions to improve uptime and operations. Terminals range from 15 inch down to 8.4 inch and are available in a wide range of resolutions (XGA, SVGA and VGA).
    Common hardware features for the GT16 include an enhanced CPU and graphics engine, integrated communication ports (RS232/RS422/Ethernet) and power supply, front mounted dual USB ports (USB host/device), compact flash and options slots and 15MB of onboard flash memory as standard.

    Purchase HMIs

    Purchase Mitsubishi GT10 HMI
    Buy Mitsubishi's entry level GOT HMI
    Purchase Mitsubishi GT11 HMI
    Buy Mitsubishi's mid level GOT HMI
    Purchase Mitsubishi GT15 HMI
    Buy Mitsubishi's Advanced GOT HMI
    Purchase Mitsubishi GT16 HMI
    Buy Mitsubishi's new flagship Graphic Operation Terminal

Items 91 to 100 of 283 total

per page
  1. 1
  2. ...
  3. 8
  4. 9
  5. 10
  6. 11
  7. 12
  8. ...
  9. 29