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Explosion Proof Self Priming Pump

1HP 230/460v 75 GPM
Model Number
Gorman-Rupp Pumps - 81 1/2D3-X1 3P: Explosion Proof Self Priming Pump

Gorman-Rupp 81-1/2D3-X1-3P

Explosion Proof, Self-priming Centrifugal pump 1HP is designed for use in hazardous environments and/or for handling flammable liquids. 1-1/4", 1-1/2" and 2" NPT port sizes available with single and 3-phase motors 1/2 to 2 HP. All models are self-priming and are equipped with FKMï½® seals with carbon and Ni-Resist faces capable of handling liquids with temperatures to 160ï½°F. Maximum flow to 128 GPM and operation pressure to 31 PSI.

  • Cast iron construction
  • FKMï½® seals with carbon and ni-resist faces
  • 1-1/4", 1-1/2" & 2" NPT port sizes
  • Self-priming up to 20 ft. on water
  • Maximum operating pressure to 31PSI
  • Maximum temperature 160ï½°F
  • Maximum flow to 128 GPM
  • Maximum head 72 ft.
  • Solids handling 3/8" diameter
  • 1/2 to 2 HP and three (3) phase 3450 RPM

Caution: Follow all safety procedures and local codes.

See Curve "B"

More Information
Model Number 81-1/2D3-X1-3P
part number 81-999-1/2D3
Series Explosion Proof Motor Pump SP Centrifugal
Max Flow (GPM.) 75
Max Flow GPH 4500
TDH Maximum (Ft) 54
TDH Maximum (PSI) 23
Horse Power (HP) 1
Horsepower (IE .5, 1, 1.5, 20) 1.0000
Inlet Connection Type FNPT
inlet size 1 ½"
Inlet (In.) 1.5
Outlet Connection Type FNPT
Outlet (In.) 1.5
Wetted Materials Cast Iron
Elastomers / O-ring FKM
Voltage (V) 230/460
Voltage (Range) 220-240/460-480
Phase (Ø) Three (3)
Motor Frequency 60
Motor EXP (C 1, Gp C/D & C11, Gp F/G)
Speed (RPM.) 3450
Self Priming Yes
Suction Lift (FT.) 20
Max Operating Temperature (F) 160
Max Particle Size (In) .37
Viscosity Milk 3.20 cp 40.00 ssu
Mechanical Seal Face NR-Ceramic
Mechanical Seal Type Single
Motor Bearings Ball
Impeller Number (In.) B
Approvals UL
Impeller Material Cast Iron
Cord Length (Ft.) 0
Duty Continuous
Drain Yes
Port Rotation No
Country of Manufacture United States
Weight (Lbs) 89.000000
UPC 072684652499
Warranty (YRS.) 1
GPM Of Water At 20 Feet Of Head 65
GPM Of Water At 30 Feet Of Head 55
GPM Of Water At 40 Feet Of Head 40