Unloader & Relief Valves
Showing 1–16 of 92 results
Category Products
General Products
Easy Prime Kit – 1/4″
- 210 Bar max pressure
- Pressure washer optional extra
- Allows easier priming of pump
- 1x 3/8" x 1/4" male elbow
- 1x 210 Bar ball valve
- Supplied as kit
Quick View- 210 Bar max pressure
- Pressure washer optional extra
- Allows easier priming of pump
- 1x 3/8″ x 1/4″ male elbow
- 1x 210 Bar ball valve
- Supplied as kit
Easy Prime Kit – 3/8″
- 210 Bar max pressure
- Pressure washer optional extra
- Allows easier priming of pump
- 1x 3/8" male elbow
- 1x 210 Bar ball valve
- Supplied as kit
Quick View- 210 Bar max pressure
- Pressure washer optional extra
- Allows easier priming of pump
- 1x 3/8″ male elbow
- 1x 210 Bar ball valve
- Supplied as kit
ES1 Easy Start Valve
- Eases the start of...
- ...engine driven plunger pumps
- Brass body
- Stainless steel seat & ball
- 280 bar rated pressure
- 30 Lpm max flow
- 80°C rated temperature
- 8mm hose barb outlet
- 3/8"BPSM inlet
Quick View- Eases the start of…
- …engine driven plunger pumps
- Brass body
- Stainless steel seat & ball
- 280 bar rated pressure
- 30 Lpm max flow
- 80°C rated temperature
- 8mm hose barb outlet
- 3/8″BPSM inlet
Interpump BH210 Unloader Valve
- 210 Bar max pressure
- 10-100 Lpm max flow
- 85°C max water temperature
- Trapped pressure valve
- Brass construction
- 1/2"BSPF inlet
- 1/2"BSPF outlet
- 3/4"BSPF bypass
Quick View- 210 Bar max pressure
- 10-100 Lpm max flow
- 85°C max water temperature
- Trapped pressure valve
- Brass construction
- 1/2″BSPF inlet
- 1/2″BSPF outlet
- 3/4″BSPF bypass
Interpump BKX Unloader Valve
- 600 Bar max pressure
- 60 Lpm max flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 1/2"BSPF inlet
- 1/2"BSPF outlet
- 3/4"BSPF bypass
Quick View- 600 Bar max pressure
- 60 Lpm max flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 1/2″BSPF inlet
- 1/2″BSPF outlet
- 3/4″BSPF bypass
Interpump H253 Unloader Valve – AISI 316
- 250 Bar max pressure
- 8-30 Lpm flow
- 60°C max water temperature
- Trapped pressure valve
- AISI 316 stainless steel
- 3/8"BSPF inlet
- 3/8"BSPM outlet
- 3/8"BSPF bypass
Quick View- 250 Bar max pressure
- 8-30 Lpm flow
- 60°C max water temperature
- Trapped pressure valve
- AISI 316 stainless steel
- 3/8″BSPF inlet
- 3/8″BSPM outlet
- 3/8″BSPF bypass
Interpump H450 Unloader Valve
- 400 Bar max pressure
- 8-50 Lpm max flow
- 85°C max water temperature
- Trapped pressure valve
- Brass construction
- 1/2"BSPF inlet
- 1/2"BSPM outlet
- 1/2"BSPF bypass
Quick View- 400 Bar max pressure
- 8-50 Lpm max flow
- 85°C max water temperature
- Trapped pressure valve
- Brass construction
- 1/2″BSPF inlet
- 1/2″BSPM outlet
- 1/2″BSPF bypass
Interpump H560 Unloader Valve – AISI 420
- 500 Bar max pressure
- 60 Lpm max flow
- 60°C max water temperature
- Trapped pressure valve
- AISI 420 stainless steel
- 1/2"BSPF inlet
- 1/2"BSPF outlet
- 1/2"BSPF bypass
- 1/4"BSPF gauge port
Quick View- 500 Bar max pressure
- 60 Lpm max flow
- 60°C max water temperature
- Trapped pressure valve
- AISI 420 stainless steel
- 1/2″BSPF inlet
- 1/2″BSPF outlet
- 1/2″BSPF bypass
- 1/4″BSPF gauge port
Interpump HM1 Unloader Valve
- 200 Bar max pressure
- 5-41 Lpm flow
- 85°C max water temperature
- Trapped pressure valve
- Brass construction
- 3/8"BSPF inlet
- 3/8"BSPM outlet
- 3/8"BSPF bypass
- 1/4"BSPM gauge port
Quick View- 200 Bar max pressure
- 5-41 Lpm flow
- 85°C max water temperature
- Trapped pressure valve
- Brass construction
- 3/8″BSPF inlet
- 3/8″BSPM outlet
- 3/8″BSPF bypass
- 1/4″BSPM gauge port
Interpump HX Unloader Valve
- 130 Bar max pressure
- 5-15 Lpm flow
- 60°C max water temperature
- Trapped pressure valve
- Brass construction
- 3/8"BSPM inlet
- 3/8"BSPM outlet
- 3/8"BSPM bypass
Quick View- 130 Bar max pressure
- 5-15 Lpm flow
- 60°C max water temperature
- Trapped pressure valve
- Brass construction
- 3/8″BSPM inlet
- 3/8″BSPM outlet
- 3/8″BSPM bypass
Interpump K1 Unloader Valve
- 250 Bar max pressure
- 9-41 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8"BSPF inlet
- 1/2"BSPM outlet
- 1/2"BSPM bypass
- 1/4"BSPF gauge ports
Quick View- 250 Bar max pressure
- 9-41 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8″BSPF inlet
- 1/2″BSPM outlet
- 1/2″BSPM bypass
- 1/4″BSPF gauge ports
Interpump K3 Unloader Valve
- 100 Bar max pressure
- 8-11 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8"BSPF inlet
- 1/2"BSPM outlet
- 3/4"M + 1/2"F BSP bypas
- 1/4"BSPF guage ports
Quick View- 100 Bar max pressure
- 8-11 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8″BSPF inlet
- 1/2″BSPM outlet
- 3/4″M + 1/2″F BSP bypas
- 1/4″BSPF guage ports
Interpump K3 Unloader Valve
- 100 Bar max pressure
- 11-16 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8"BSPF inlet
- 1/2"BSPM outlet
- 3/4"M + 1/2"F BSP bypass
- 1/4"BSPF guage ports
Quick View- 100 Bar max pressure
- 11-16 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8″BSPF inlet
- 1/2″BSPM outlet
- 3/4″M + 1/2″F BSP bypass
- 1/4″BSPF guage ports
Interpump K3 Unloader Valve
- 100 Bar max pressure
- 16-21 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8"BSPF inlet
- 1/2"BSPM outlet
- 3/4"M + 1/2"F BSP bypass
- 1/4"BSPF guage ports
Quick View- 100 Bar max pressure
- 16-21 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8″BSPF inlet
- 1/2″BSPM outlet
- 3/4″M + 1/2″F BSP bypass
- 1/4″BSPF guage ports
Interpump K5 Unloader Valve
- 200 Bar max pressure
- 11-16 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8"BSPF inlet
- 1/2"BSPM outlet
- 3/4"M + 1/2"F BSP bypass
- 1/4"BSPF guage ports
Quick View- 200 Bar max pressure
- 11-16 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8″BSPF inlet
- 1/2″BSPM outlet
- 3/4″M + 1/2″F BSP bypass
- 1/4″BSPF guage ports
Interpump K5 Unloader Valve
- 200 Bar max pressure
- 16-25 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8"BSPF inlet
- 1/2"BSPM outlet
- 3/4"M + 1/2"F BSP bypass
- 1/4"BSPF guage ports
Quick View- 200 Bar max pressure
- 16-25 Lpm flow
- 60°C max water temperature
- Flow sensitive valve
- Brass & st.steel construction
- 3/8″BSPF inlet
- 1/2″BSPM outlet
- 3/4″M + 1/2″F BSP bypass
- 1/4″BSPF guage ports
