This thermal bypass valve is ideally suited for hydrostatic drive circuits which require fast warm-up, controlled fluid temperature, and low return line back pressure. When installed in the return line of a hydraulic circuit that employs an oil cooler, this device will modulate fluid temperature by either shifting return line flow through the cooler, or bypassing directly to the reservoir. A built-in pressure relief function automatically relieves excess pressure to the reservoir should the cooler become restricted and resultant pressure drop become too high for the cooler circuit.
Our heavy duty thermostatic valves operate in a wide range of temperatures and in any position. Valves are compact, self-contained and tamper-proof. Acceptable for oil or water service and available with ½”, ¾”, 1″, 1½” & 2″ NPT Ports.
Constructed of heavy duty forged brass, our Y-Strainers have a temperature range of -10°F to 250°F and are suitable for 600 WPG service, 150 PSI WSP, with female X female connection. Screwed caps are straight threaded with PTFE gaskets. 304 Stainless steel 50 mesh screen ¼” – 1″ or 304 Stainless steel 20 mesh screen 1¼” – 2″.
The modulating valves open automatically when temperature increases at the sensing bulb. No external power source is required to actuate the valve. Not to be used for salt water service. All stock valves are supplied with a drilled and tapped internal by-pass in the regulator body. A solid plug is installed in this hole for 100% shut-off. A drilled orifice plug is packed in an envelope with each valve for field installation, if continuous minimum flow is required. These modulating valves regulate the flow of water to the heat exchanger to maintain a desired exiting oil temperature.