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Parker Series RK, RB Threaded Check Valves
The screwable check valves series RK and RB are designed to go into simple, threaded cavities. They block the flow in one direction and open in the opposite direction.
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Parker’s very robust check valves series RK and RB ensure a reliable operation even at high operating pressures (up to 700 bar). They are designed to be screwed into simple, threaded cavities. The connection is O-ring sealed on the 118° shoulder in the mounting cavity. The valve body is supplied as a unit, with a spring loaded, hardened and polished semisphere of stainless bearing steel inside. The seat is also hardened and ground.
Markets:
• Industrial
Benefits:
• Proven, solid design – very good wear behaviour
• Zero leakage in closed position – ensures reliable operation
• Short delivery time – no warehousing necessary
• Two variations:
– RK: mounted in the blocked direction
– RB: mounted in open flow direction
Applications:
• Suitable for general hydraulic applications
Technical Specifications
| Product Series | Check valve |
| Actuation Type | Mechanical |
| Mounting Type | Screw-in mounting |
| Mounting Position | Unrestricted |
| Configuration | Mounted in the blocked/open flow direction |
| Connection Type | Thread (DIN ISO 228/1) |
| Connection Size | Depending on size, G1/4A-G1/2A |
| Maximum Operating Pressure | Depending on size, 500-700 bar |
| Cracking Pressure | Depending on size, 0.07-0.25 bar |
| Maximum Flow Rate | Depending on size, 10-80 L/min |
| Flow Direction | N/A |
| Maximum Operating Temperature | 60 °C |
| Minimum Operating Temperature | -20 °C |
| Seal Material | NBR |
| Body Material | Steel |
| Weight | 5, 15, 20 g |
Parker Series RK, RB Threaded Check Valves Service Manual
Parker Series RK, RB Threaded Check Valves Service Manual
