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Gorman-Rupp Industries
Standard Bellows Metering Pumps

Standard Bellows Metering Pumps

Product catalog summary

Overview:
GRI Standard Bellows Metering Pumps are designed for both corrosive and noncorrosive fluids, operating on a positive displacement principle. They offer high accuracy (± 0.5% stroke to stroke) and maintain discharge pressure across the flow range. Key features include dry run capability, self-priming, no dynamic seals, corrosion resistance, and long maintenance-free operation. Typical applications include film processors, silver recovery systems, and water treatment systems.

Pump Operation:
The pumps utilize a lever pivot crank mechanism to convert motor rotation into a squeezing motion on a bellows module, ensuring consistent fluid displacement. Optimum operation requires a minimum suction lift and discharge head, with vertical mounting for accuracy.

Flow Rate and Discharge Pressure:
Flow rate is influenced by bellows diameter, motor speed, and stroke length. Bellows are available in various sizes, affecting full stroke displacement and maximum discharge pressure. Flow adjustments can be made down to 10% of full stroke, with two adjustment styles available: Standard Crank and BEL O JUST®.

Specifications:
Flow rates range from 3.9 ml/min to 3000 ml/min, with discharge pressures from 5 to 50 psi. Maximum fluid temperature is 140°F, with reduced pressure ratings for temperatures over 120°F. The pumps handle viscosities up to 5,000 centistokes and can manage fine slurries.

Materials and Selection:
Materials in contact with solutions include polypropylene connectors and EPT/EPDM or Viton® elastomers. Pump selection involves choosing a bellows size that meets pressure requirements and selecting appropriate valve and O-ring combinations.

Model Specifications:
Models vary by bellows size, motor RPM, and flow capacity. Single and tandem bellows configurations are available, with modular designs for proportioning separate liquids. Electrical specifications include 115V and 240V options, with continuous duty rated motors.

Dimensions:
Detailed dimensions are provided for various models, ensuring proper installation and compatibility with existing systems.

Three Tandem Bellows Pumps:
These pumps feature a modular design for proportioning separate liquids, with independently adjustable flow rates for each bellows module. The total output is limited to 3,000 ml/min. Ordering requires specifying valve and O-ring materials, as well as connector types.

Single Stroke Dispensing Bellows Pumps:
These pumps are triggered by a switch and are designed for intermittent duty cycles. Flow rates can be adjusted, and gearmotors are rated for intermittent use. Ordering involves selecting valve and O-ring materials and connector types.

Heavy Duty Bellows Pumps:
Designed for dusty environments or applications requiring long life, these pumps feature a totally enclosed gearmotor with a lifespan of over 10,000 hours. They are recommended for continuous duty applications.

Dial-A-Flow® Bellows Pumps:
This model includes an adjustable speed motor, allowing for infinite speed adjustments from 3 to 60 RPM. It uses a standard crank mechanism for flow rate adjustments.

Part Selection Guide:
The document includes a guide for selecting bellows materials and connectors, with codes for different elastomeric materials and connector types. It also provides options for motors, valve bodies, and pump covers.

Check Valves:
Specifications for single and dual check valves are provided, including opening pressures and materials in contact with solutions. Options for tubing connectors are also listed.

Materials in Contact with Solution:
Components such as the body, valve seat, connectors, and screen are made of Polypropylene, while O-rings are available in EPT/EPDM or Viton®/Fluoroelastomer. The spring is made of Hastelloy® C. Tubing connectors are available in 1/2” or 3/8” I.D.

Check and Foot Valves:
These valves are essential for maintaining a pump's prime and preventing backflow in applications with long suction lengths. Check valves can be installed in-line on either the suction or discharge side, whereas foot valves are used only on the suction side.

Anti-Siphon Spring Kits:
These kits are used to spring-load poppet valves, ensuring a more positive shutoff and allowing pump use where there is positive pressure on the suction side. They are available for 1", 1½", and 2½" models, with selection based on required blow-off pressure (PSI).

Replacement Kits:
Various replacement kits are available for bellows metering pumps, including bellows module kits, crank kits, and motor kits. Each kit contains specific components such as connecting rods, bellows modules, and O-rings, depending on the type of kit.

Valve and Connector Kits:
Poppet valve kits include poppet valves and O-rings, while duckbill valve kits come with duckbill valves, seal washers, a valve extension, and an O-ring. Tubing connector kits include connectors and connector nuts.

Catalog excerpts

Standard Bellows Metering Pumps 180 Hines Ave. • Bellville, OH 44813 • PH: 419-886-3001 • FAX: 419-886-2338 • www.GRIpumps.com GRI Standard Bellows Pump

Open the catalog to page 1

Standard Bellows Metering Pumps Overview Bellows metering pumps operate on a positive displacement principle. Pumps are designed to displace both corrosive and noncorrosive fluids. Accurate to ± 0.5% from stroke to stroke, when pump is set 50% to 100% of full stroke. Discharge pressure is maintained over the entire flow range of the pump. Poppet valves are used to prevent back flow; and springs are available to provide a positive shutoff, preventing siphoning through the pump in applications where a positive suction head exists. Features: • Repeatability from stroke-to-stroke to ± 0.5% • Dry...

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Flow Rate and Discharge Pressure The flow rate of each bellows module is regulated by three factors: 1. Diameter of the bellows, 2. Speed of the gear motor, 3. Adjustment of the module stroke length. Bellows are available in several different diameters. The full stroke displacement and discharge pressure of the pump is dependent on the size of the bellows as shown below: /2” Full Stroke Displacement in ml Maximum Discharge Pressure (psi) Flow Adjustment: The flow rate of all bellows pumps can be adjusted by modifying the length of the discharge stroke. Adjustments can be made down to 10% of full...

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Pump Specifications: Flow Rates — Range from 3.9 ml/min to 3000 ml/min, depending on pump configuration, gearmotor speed and stroke length. Discharge Pressures — Range from 5 to 50 psi depending on bellows size. Max Fluid Temperature — 140°F (60°C) Note: Reduce pressure rating by 50% for fluid temperatures over 120°F (49°C). Viscosity/Slurries — Maximum fluid viscosity is 5,000 centistokes. Poppet valves can handle fine slurries. Duckbill valves are recommended for heavy slurries or fibrous materials. Heavy slurries should be flushed from the pump before shutdown. MAXIMUM DRY AND WET PRIMING...

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Single Bellows Pumps Standard & BEL O JUST Models Order notes: When ordering a single bellows model, add one “X” code for valve and O-ring material selection and one MODEL SPECIFICATIONS “T” code for connector selection from the Bellows Part Selection Guide on page Discharge16. Maximum Flow Gallons (Liters) Standard Single BEL O JUST Max. Electrical Approx. Bellows Strokes per minute ml per minute per hour Number Model Number Pressure RPM) per module module Example: 13300-007 (1” bellows model) withModel EPT/EPDM poppet valves and(Motor O-rings and elbow perconnectors for Amps* 3⁄8” Wt. Hz 240V/60...

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Typical Dimensions Single Bellows Pumps Standard & BEL O JUST Models .44 (11.18) BEL-O-JUST MODEL ONLY 2 1⁄2 " Model .44 (11.18) BEL-O-JUST MODEL ONLY .44 (11.18) BEL-O-JUST MODEL ONLY FLOW Dimensions in Inches (Dimensions in Millimeters) 180 Hines Ave. • Bellville, OH 44813 • PH: 419-886-3001 • FAX: 419-886-2338 • www.GRIpumps.com GRI Standard Bellows Pumps Overview 0119

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Two Tandem Bellows Pumps Standard & BEL O JUST Models Two tandem bellows pumps feature modular design for proportioning separate liquids. The flow rate of each bellows module is independently adjustable. Bellows modules are assembled out-of-phase for most efficient power usage. Total output of pump is limited to 3,000 ml/min. BEL O JUST® TWO TANDEM MODEL Order notes: When ordering a two tandem bellows model, add one “X” code for valve and O-ring material selection and one “T” code for connector selection from the Bellows Part Selection Guide on page 16. Example: 13726-014 (1½” x 1½” two tandem...

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Typical Dimensions Two Tandem Bellows Pumps Standard & BEL O JUST Models Dimensions in Inches (Dimensions in Millimeters) 180 Hines Ave. • Bellville, OH 44813 • PH: 419-886-3001 • FAX: 419-886-2338 • www.GRIpumps.com GRI Standard Bellows Pumps Overview 0119

Open the catalog to page 8

Three Tandem Bellows Pumps Standard & BEL O JUST Models Three tandem bellows pumps feature modular design for proportioning separate liquids. The flow rate of each bellows module is independently adjustable. Bellows modules are assembled out-of-phase for most efficient power usage. Total output of pump is limited to 3,000 ml/min. BEL O JUST® THREE TANDEM MODEL Order notes: When ordering a three tandem bellows model, add one “X” code for valve and O-ring material selection and one “T” code for connector selection from the Bellows Part Selection Guide on page 16. Example: 13700-011 (1” x 1” x 1”...

Open the catalog to page 9

Typical Dimensions Three Tandem Bellows Pumps Standard & BEL O JUST Models Dimensions in Inches (Dimensions in Millimeters) 180 Hines Ave. • Bellville, OH 44813 • PH: 419-886-3001 • FAX: 419-886-2338 • www.GRIpumps.com GRI Standard Bellows Pumps Overview 0119

Open the catalog to page 10

Single Stroke Dispensing Bellows Pumps Actuation of the single stroke dispensing pump is triggered by a switch. The crank makes one revolution before a microswitch interrupts the power circuit. Flow rates can be adjusted. Gearmotors on dispensing pump are rated for intermittent duty cycles. 2 1/2” SINGLE STROKE MODEL Order notes: When ordering a single stroke model, add one “X” code for valve and O-ring material selection and one “T” code for connector selection from the Bellows Part Selection Guide on page 16. Example: 12800-007 (2½” bellows model) with EPT/EPDM poppet valves and O-rings and...

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Typical Dimensions Single Stroke Dispensing Bellows Pumps 1 1⁄2 " Model DIMENSIONS Pump Model Dimensions in Inches (Dimensions in Millimeters) 180 Hines Ave. • Bellville, OH 44813 • PH: 419-886-3001 • FAX: 419-886-2338 • www.GRIpumps.com GRI Standard Bellows Pumps Overview 0119

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Heavy Duty Bellows Pumps The heavy-duty models are specially designed for use in dusty environments or for those applications requiring extremely long life. The pump is supplied with a totally enclosed gearmotor with an expected life of over 10,000 hours. The standard crank mechanism is used on heavy-duty pumps. The heavy-duty pump is recommended for 24 hour/ day continuous duty applications. 2 1/2” HEAVY DUTY MODEL Order notes: When ordering a heavy-duty model, add one “X” code for valve and O-ring material selection and one “T” code for connector selection from the Bellows Part Selection Guide...

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Standard Bellows Metering Pumps

Standard Bellows Metering Pumps

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