Medium Duty Positive Displacement Pumps
One Year Manufacturer Warranty

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Gorman-Rupp GMS Series Medium Duty Positive Displacement Pumps

Rotary gear, medium duty, standard size pumps

Ships From Manufacturer

Select Model & Quantity:

Model # Description Price Qty
GMS1 1/2GC3-B /50D6580A 1.5 in. NPT Inlet/Outlet, 16 Max GPM, Graphite/Teflonandreg; Seals, 1750 Max RPM $1,205.00
GMS1DE3 /40C70A 1 in. NPT Inlet/Outlet, 12 Max GPM, Type 21 Mechanical Seals, Basic Drive $1,140.00
GMS1 1/2GC3-B /40C50D6070A80A 1.5 in. NPT Inlet/Outlet, 16 Max GPM, Carbon/Ceramic/Vitonandreg; Seals, 1750 Max RPM $1,365.00
GMS1 1/2GH3-B /50E6580A 1.5 in. NPT Inlet/Outlet, 31 Max GPM, Graphite/Teflonandreg; Seals, 1750 Max RPM $1,230.00
GMS1 1/2GH3-B /40C50E6070A80A 1.5 in. NPT Inlet/Outlet, 31 Max GPM, Carbon/Ceramic/Vitonandreg; Seals, 1750 Max RPM $1,390.00
GMS1 1/2NK3-B /50G6580G 1.5 in. NPT Inlet/Outlet, 90 Max GPM, Graphite/Teflonandreg; Seals, 870 Max RPM $3,070.00
GMS2RM3-B /50L6580N 2 in. NPT Inlet/Outlet, 149 Max GPM, Graphite/Teflonandreg; Seals, 640 Max RPM $4,365.00
GMS2 1/2RM3-B /50L6580N 2.5 in. Inlet/Outlet, Connection Type 125#, 149 Max GPM, Graphite/Teflonandreg; Seals, 640 Max RPM $4,365.00
GMS3RP3-B /50N6580N 3 in. Inlet/Outlet, Connection Type 125#, 183 Max GPM, Graphite/Teflonandreg; Seals, 640 Max RPM $4,410.00
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Gorman-Rupp GMS Series G Series Medium Duty Positive Displacement Pumps
Manuals and Information:
GMS Series Spec Sheet

The GMS Series is designed for intermittent or medium duty service for applications in the operating ranges noted. These units are available with head and backhead jackets for temperature control, carbon graphite bushings for low viscosity liquids, silicon carbide bushings for wear resistance. For continuous duty service, or for handling viscous liquids, see heavy duty GHC pumps.

These cast iron pumps are designed to provide form, fit, and function capabilities as direct drop-in replacements for popular Viking pumps (see chart).

Specifications:
  • Size: 1" (25 mm), 1-1/2" (40 mm), 2" (50 mm), 2-1/2" (60 mm), 3" (80 mm), 4" (100 mm), 5" (125 mm), 6" (150 mm)
  • Max Capacity: 600 GPM (38 lps)
  • Max Viscosity: 250000 SSU (53925 cST)
  • Max Pressure: 150 PSI (11 BAR)
  • Min Temperature: -60 F (-51 C)
  • Max Temperature: 450 F (232 C)
  • Materials of Construction: Cast Iron
NOTE: All pumps are provided with a standard Pressure Relief Valve (PRV) factory set at 75 PSI, unless specified.



IMPORTANT: For proper operation of this pump, please check the chemical resistance chart before ordering. The warranty will be voided if the pump is used for an application that the pump materials are not compatible with.
Gorman-Rupp Chemical Resistance Chart

Model Replaces Viking Model Port Size Connection Type Housing Material Seal Type Seal Material Bushing Material Max RPM Max GPM Max PSI Min SSU Max SSU
GMS1 1/2"C3-B /50D6580A h52 1.5" NPT Iron Pack. Graphite/Teflon Bronze 1750 16 150 500 2,499
GMS1 1/2"C3-B /40C50D6070A80A h532 1.5" NPT Iron Mech. Carbon/Ceramic/Viton Carbon 1750 16 150 28 2,499
GMS1 1/2"h5-B /50E6580A HL32 1.5" NPT Iron Pack. Graphite/Teflon Bronze 1750 31 150 500 2,499
GMS1 1/2"h5-B /40C50E6070A80A HL432 1.5" NPT Iron Mech. Carbon/Ceramic/Viton Carbon 1750 31 150 28 2,499
GMS1 1/2"K3-B /50G6580G K32 1.5" NPT Iron Pack. Graphite/Teflon Bronze 870 90 150 500 2,499
GMS2NM3-B /50J6580G KK32 2" NPT Iron Pack. Graphite/Teflon Bronze 870 120 150 500 2,499
GMS2RM3-B /50L6580N L32 2" NPT Iron Pack. Graphite/Teflon Bronze 640 149 150 500 2,499
GMS2 1/2"M3-B /50L6580N LQ32 2.5" 125# Iron Pack. Graphite/Teflon Bronze 640 149 150 500 2,499
GMS3RP3-B /50N6580N LL32 3" 125# Iron Pack. Graphite/Teflon Bronze 640 183 150 500 2,499

Option Descriptions:

40C - Carbon Graphite Idler Bushing 50D - "GC" Interchange Shaft (H), "GF" Extended Shaft
50E - "GH" Shaft Interchange (HL), "GJ" Extended Shaft
50G - "NK" Interchange Shaft (K)
50J - "NM" Interchange Shaft (KK), "NP" Extended Shaft
50L - "RM" Interchange Shaft (L, LQ), "RR", "RS" Extended Shaft 50N - "RP" Interchange Shaft (LL)
60 - Friction Drive: Carbon/Ceramic/Viton®
65 - Packing - Graphite/Teflon® (GMS)
65 - Packing - Carbon Fiber (GHS)
70A - Carbon Graphite Shaft Bushing / Washer (GMS)
70A - Carbon Graphite Shaft Bushing (GHS)
80A - 2.75" Ctr. Ht.(G, H, HL Interchange) (GMS)
80D - 3.50" Ctr. Ht. (H, HL Interchange) (GHS)
80G - 4.63" Ctr. Ht. (K/KK Interchange) (GMS)
80L - 5.50" Ctr. Ht. (K, KK Interchange) (GHS)
80N - 6.00" Ctr. Ht.(L/LQ/LL Interchange) (GMS)
80U - 7.00" Ctr. Ht. (L, LQ, LL Interchange) (GHS)

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