Spec Sheet

YU2158

FLOW SENSITIVE FLOW SENSITIVE

GENERAL PUMP A member of the Interpump Group

SPECIFICATIONS

Stainless Steel Trapped Pressure Unloader Valve

General Pump

is a member of

the Interpump Group

General Pump recommends using a safety relief device in conjunction with this unloader valve when installed on a positive displacement

pump. General Pump is not liable and assumes no responsibility when used in a customer’s high pressure system.

Ref 300398 Rev. E

08-19

Part Number YU2158

Max Volume 21 GPM

Max Discharge Pressure 5800 PSI

Max Temp 200º F

Inlet Port Sizes 1/2” NPT-F

Dimensions 8.3” x 3.8” x 1.5”

Weight 4.2 lbs

Materials Stainless Steel, Brass, Buna-N

DIMENSIONS

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GENERAL PUMP YU2158 A member of the Interpump Group Stainless Steel Trapped Pressure Unloader Valve SPECIFICATIONS Part Number YU2158 Max Volume 21 GPM FLOW SENSITIVE FLOW SENSITIVE Max Discharge Pressure 5800 PSI Max Temp 200º F Inlet Port Sizes 1/2” NPT-F Dimensions 8.3” x 3.8” x 1.5” Weight Materials 4.2 lbs Stainless Steel, Brass, Buna-N General Pump recommends using a safety relief device in conjunction with this unloader valve when installed on a positive displacement pump.
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GENERAL PUMP YU2158 A member of the Interpump Group Stainless Steel Trapped Pressure Unloader Valve PARTS LIST No. Part No. Description Qty. No. Part No. Description Qty. 1 Y60043251 Piston 1 13 Y60043851 Inlet Fitting, 1/2” NPT SS 1 2* Y10401400 Back-up Ring, 18x135.x1.2 mm 2 14 Y60041051 Spring, 1.6x44.5x20 mm, SS 1 3* Y10317801 O-ring 2.62x13.1 mm 1 15* Y14746100 Ball, 13/32”, SS 1 4 Y10307201 O-ring 1.78x20.35 3 16* Y10306001 O-ring, 1.78x14.
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GENERAL PUMP YU2158 A member of the Interpump Group Stainless Steel Trapped Pressure Unloader Valve INSTALLATION On a system that produces hot water, consider installing safety devices which limit the accidental increase of the fluid temperature. Always install a safety valve to protect the operator and system. Choose a correct nozzle size, able to discharge regularly, on bypass, at least 5% of the total flow of the system, in order to achieve a constant pressure, and avoid troublesome pressure spikes.