ZK70 GP ZK7 Flow Sensitive Unloader Valve 2.1-2.9 GPM @ 3500 PSI by General Pump. Eliminates high pressure in all lines while unit is in bypass mode. Maximun PSI 3500, Maximun Temp 165 deg F., 3/8 in. BSP-F Inlet, 3/8″ BSP-M Outlet, 3/8 in. BSP-F By-Pass. Choose model with orifice size carefully due to the fact that these flow sensitive unloaders will not work properly with flow rates outside of their flow range. Other available orifice sizes: ZK71 3.0 – 4.2 GPM, ZK72 4.2 – 6.6 GPM, ZK73 6.6 – 10.8 GPM.
Flow sensitive unloader valves do not work well with high pressure hose lengths in excess of 100′.
- Features all stainless and brass internal parts.
- New design reduces sensitivity to entrapped air.
- No external moving parts or springs.
- Eliminates high pressure in all lines while unit is in bypass mode.
- Bypass restrictor eliminates pressure peaks during bypass.
- Unique balanced piston design permits precise pressure adjustments.
- Simple design for easy maintenance and service.
- Maximum Volume Range: 2.1-2.9 GPM
- Maximum Pressure: 3500 PSI
- Maximum Temperature: 165 Deg. F.
- Inlet: 3/8 BSP-F
- Outlet: 3/8 BSP-M
- Bypass: 3/8 BSP-F
- Overall Dimension: 7.5 x 3.75 x 3.5
- Material: Brass, Stainless Steel, Buna-N
- Weight: 4.5 Lbs.
