The Cla-Val Model 90AF-4A-3 Combination Pressure Reducing, Surge and Deadman Shutoff Valve is a hydaulically-operated, diaphragm actuated, globe or angle pattern valve. It is available in various materials and full range of sizes. It consists of three major components: body, diaphragm assembly and cover. The diaphragm assembly is the only moving part. The rugged simplicity of design and packless construction assure a long life dependable, trouble-free operation. Should the diaphragm become damaged the valve will close tight, providing “fail safe” operation. The 90AF-4A-3 Hytrol Valve is used in many types of piping system requiring control, flow regulation, rate of flow control, or check valve operation.
Maintains constant downstream pressure
Closes quickly to prevent downsream surge when flow is stopped suddenly
Surge control prevents damage to refuelers
Used in conjunction with Cla-Val Bottom-Loading Pantograph