G Series Gear Pumps

//G Series Gear Pumps
G Series Gear Pumps 2018-03-07T11:17:53+00:00
gear pump

G Series

The Gorman-Rupp G Series range of self priming positive displacement rotary gear pumps is designed to provide superior performance in the transfer of process fluids, unmatched in the industry. Available in Medium-Duty , Heavy-Duty  and Extreme-Duty  (abrasive service) models, gear pump materials include cast iron, cast steel and stainless steel. G Series self priming pumps are manufactured with unique features that enable them to perform better and last longer on countless applications, providing quality and reliability that make the G Series the premier gear pump in the industry. These features include:

  • An automatic idler pin lubrication system uses the pumped fluid to continuously cool and lubricate the idler pin and bush to reduce wear in this area.
  • An internal seal cavity venting system provides a continuous flow of liquid through the seal area, ensuring cooling and reducing pressure. This reduces seal face load, increasing seal life.
  • A deep “end-feed” area offers superior priming performance under low inlet pressure conditions and/or high viscosity liquids.
  • Easy to service
  • Viscosities to 440,000 cSt
  • Pressures to 20.7 bar (300 psi)
  • Flows to 2200 litres per minute
  • Handle a variety of liquids , including highly viscous, high temperature and abrasive fluids
  • Widest range of sealing options  in the industry
  • High strength gear material eliminates the need for special steel fittings traditionally needed for viscous applications.
  • Widest range of housing ports
  • Widest range of bushing materials

G Series Gear Pump – Special Features

Deep End Feed Area Deep end feed area decreases the Net Inlet Pressure Required by the gear pump, which in turn, allows pumps to run at faster speeds. Smaller gear pumps with direct drive motors can therefore be used where “traditional” rotary gear pumps would need to be bigger with gear boxes. This feature also offers superior priming performance. gear pumps
Automatic Idler Pin Lubrication System Gorman-Rupp’s unique internal pressure lubricated idler pin reduces wear by continuously cooling and lubricating the idler pin and bushing. diaphragm pump
Internal Seal Vent Gorman-Rupp’s seal cavity venting system provides a continuous flow of liquid through the cavity, ensuring cooling. This system also ensures that the seal cavity is under lower pressure than “conventional” pumps, reducing seal face load and increasing seal life. diaphragm pumps
Back Pull-Out Design The back pull-out design allows service and maintenance without disconnecting gear pump housing from piping. Servicing is therefore faster and more cost effective.
Adjustable No-Leak Pressure Relief Valve Gorman-Rupp’s O-Ring seal design on the relief valve allows for adjustment during operation, without leakage. This means a safer and cleaner environment for operators gear pump
Flexible Seal Design Gorman-Rupp heavy duty gear pumps allow for the most flexible sealing arrangements in the industry. They are engineered to allow installation of “industry standard” cartridge seals as well as a full array of Gorman-Rupp packing, lip seal and mechanical seal options. gear pumps

G Series Gear Pump – Overview

How a Gorman-Rupp Rotary Gear Pump Works

Medium Duty G Series Pumps

Gorman-Rupp Medium Duty G Series Pumps are designed for general intermittent duties. Duty parameters are as follows:

Port Sizes 1” [25mm] through to 6” [150mm]
Maximum Capacity [Flow] 2200 litres per minute
Maximum Pressure 10.3 bar
Maximum Viscosity 54,000 cSt
Temperature Range -40oC to 232oC
Casing Materials Cast Iron
Bushing materials Bronze, Carbon Graphite and Silicon Carbide
Number of Seal Options 7

 

Heavy Duty Pumps

Gorman-Rupp Heavy Duty G Series Pumps are designed for the most demanding clean liquid applications, combining high performance materials and innovative design to outperform all other pumps of their type. They are the most capable and versatile gear pump in the industry. Duty parameters are as follows:-

GHS Cast Iron Pumps

Port Sizes 1” [25mm] through to 6” [150mm]
Maximum Capacity [Flow] 2200 litres per minute
Maximum Pressure 20.7 bar
Maximum Viscosity 440,000 cSt
Temperature Range -51oC to 343oC
Casing Materials Cast Iron
Bushing materials Bronze, CG, SiC, High Temp CG, High Temp SiC
Number of Seal Options 26

 

GHS Cast Steel Pumps

Port Sizes 1” [25mm] through to 4” [100mm]
Maximum Capacity [Flow] 1100 litres per minute
Maximum Pressure 20.7 bar
Maximum Viscosity 440,000 cSt
Temperature Range -29oC to 343oC
Casing Materials Cast Steel
Bushing materials Bronze, CG, SiC, High Temp CG, High Temp SiC
Number of Seal Options 25

 

GHS Stainless Steel Pumps

Port Sizes 1” [25mm] through to 3” [75mm]
Maximum Capacity [Flow] 400 litres per minute
Maximum Pressure 13.8 bar
Maximum Viscosity 54,000 cSt
Temperature Range -34oC to 177oC
Casing Materials 316 Stainless Steel
Bushing materials CG, SiC, High Temp CG, High Temp SiC, Tungsten
Number of Seal Options 17

 

 

Extreme Duty G Series Pumps

Gorman-Rupp Extreme Duty G Series Pumps are the most rugged, wear resistant gear pumps in the world. Designed to survive the severe challenge of liquids containing abrasives, the Gorman-Rupp GHA Extreme Duty pumps combine proven gear pump technology with state-of-the-art wear-resistant features, making them the world’s toughest, longest-lasting gear pumps. Duty parameters are as follows:

Port Sizes 1” [25mm] through to 4” [100mm]
Maximum Capacity [Flow] 1230 litres per minute
Maximum Pressure 13.8 bar
Maximum Viscosity 54,000 cSt
Temperature Range -51oC to 260oC
Casing Materials Cast Iron, with heat treating to critical wear areas
Bushing materials Silicon Carbide, Tungsten Carbide and High Temp SiC
Number of Seal Options 7

 

 

Easy Access

Because Gorman-Rupp self priming pumps are located at ground level, high and dry above the liquid level, they are easy to access for monitoring, service and repair.

Whereas submersible pumps can only be accessed by opening wet well lids (exposing operators to “working at heights” and “working over water”) and winching or craning pumps to the surface (exposing operators to “working with swinging weights”), operators can access Gorman-Rupp self primers at ground level.

End suction pumps will often need a “dry well” which is accessed by going down stairs or a ladder. They need isolation valves on the suction. This makes them more difficult to access than Gorman-Rupp self primers.

G Series Pump Variety of Fluids

G Series pumps a variety of fluids, including, but not limited to:

 

Hydrocarbons, Petrochemicals and similar:

  • Oils                                         * Fuels
  • Fats                                        * LPG

 

Viscous Liquids and Polymers:

  • Glues/ Adhesives                   *Grease
  • Asphalt                                   * Varnish
  • Styrenes


Food Process
:

  • Liquid margarine                   *Honey                              * Corn Syrup
  • Shortening                            * Vegetable oils                 * Fats
  • Hot cooking oils                    * Blood                              * Liquid sugars
  • Chocolates                           * Brewer’s yeast                * Molasses


Thermosensitive Liquids
:

  • Resins                                   * Tar                                  * Wax


Acids:

  • Acetic                                    * Phosphoric                      * Palmitic


Solvents
:

  • Ketones                                * Acetone


Manufacturing
:

  • Paints                                    * Inks                              * Hydraulic fluid
  • Fuels (diesel, kerosene etc)                                        * Butane
  • Alcohols                                 * Anhydrous Ammonia   * Glycol
  • Varnish                                  * LP Gas                         * Caustics
  • Sulphites                                * Freons                         * Grease

G Series Sealing Options

G Series pumps offer the widest range of sealing options in the industry. These options include:

Seal Type Seal Materials Maximum Viscosity [cSt] Temperature Range oC
Mechanical-Friction Drive Carbon/ Ceramic/ Viton® 3,250 -17 to 204
Mechanical-Friction Drive Carbon/ Ni-Resist/ Buna-N 3,250 -45 to 107
Mechanical-Friction Drive Carbon/ Ni-Resist/ Neoprene 3,250 -45 to 99
Mechanical-Positive Drive Carbon/ SiC/ Teflon® Encapsulated 5,400 -60 to 260
Mechanical-Double Friction Drive Carbon/ Ceramic/ Viton® 11,000 -17 to 204
Mechanical-Ammonia Double Friction Drive Carbon/ Ceramic/ Neoprene 11,000 -45 to 99
Mechanical-Tandem Friction Drive Carbon/ Ceramic/ Viton® 3,250 -17 to 204
Mechanical-Friction Drive SiC/ SiC/ Viton® 3,250 -17 to 204
G-R Cartridge-Friction Drive Carbon/ Ni-Resist/ Viton® 3,250 -17 to 204
G-R Cartridge-Positive Drive Carbon/ SiC/ Teflon® Encapsulated O 5,400 -60 to 260
G-R Cartridge-Balanced Type 1B Carbon/ Ni-Resist/ Viton 3,250 -17 to 204
G-R Cartridge-Balanced Type 1B Carbon/ Ni-Resist/ Neoprene 3,250 -45 to 99
Cartridge Carbon/ SiC/ Chemraz® 5,400 -20 to 260
Cartridge-Metal Bellows Carbon/ SiC/ Teflon® Encapsulated O 5,400 -29 to 204
Cartridge-Metal Bellows SiC/SiC/ Teflon® Encapsulated O-rings 5,400 -29 to 204
Cartridge-Metal Bellows SiC/SiC/ Kalrez® 5,400 -29 to 204
Cartridge Carbon/ TC/ Chemraz® 5,400 -68 to 315
Cartridge Carbon/ SiC/ Viton® 3,250 -17 to 204
Cartridge SiC/ SiC/ Viton® 3,250 -17 to 204
Cartridge-Double/ Tandem Carbon/ SiC/ Chemraz® 3,250 -17 to 204
Cartridge-Triple Lip Seal Teflon®/ CiC/ Chemraz® 440,000 -68 to 149
Packing Carbon Fibre 440,000 -45 to 260
Packing Teflon®/Graphite 44,000 -45 to 260
Packing Hi Temp Graphoil 44,000 -45 to 343

 

G Series Housing Ports 

All Gorman-Rupp G Series rotary gear pumps are available in a variety of port sizes,
orientation and flange type. Each hydraulic size has up to 3 different port sizes to
enable the perfect matching to pipe sizes. Ports are also available as 90o or 180o,
which can be rotated in 45o increments.

The various port sizes can be supplied with tapped ports, 125# ANSI Flanged,
250# ANSI Flanged, or 25 bar DIN Flanged.

G Series Bushing Options

G Series pumps offer the widest range of bushing options in the industry. These options include:-

Bushing Material Viscosity Limits [cSt] Temperature Limits oC Suitable for Abrasive Service Suitable for Corrosive Service
Bronze 108 to 21,000 232 No No
Carbon Graphite 0.1 to Pump Max 205 No Yes
High Temp Carbon Graphite 0.1 to Pump Max 360 No Yes
Silicon Carbide 0.1 to Pump Max 205 Yes Yes
High Temperature Silicon Carbide 0.1 to Pump Max 360 Yes Yes
Tungsten Carbide 22 to 22,000 150 Yes Yes