The 168 and 168H Series pneumatically operated three-way snap-acting switching valves are used to switch pressures on and off in response to a predetermined change in an input signal pressure.
In operation, increasing pressure applied to the top of the diaphragm through Port D moves the stem and upper range adjusting nut toward the trip lever. When the diaphragm pressure reaches the predetermined upper tripping pressure, the upper adjusting nut pivots the trip lever to move the rocker assembly to its alternate position, closing Port C and opening Port B. When decreasing pressure to the diaphragm at Port D reaches the lower tripping pressure, the spring moves the stem and lower range adjusting nut to return the rocker to its original position, closing Port B and opening Port C.
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Temperature Capabilities
-10° to 150°F (-23° to 66°C)
Maximum Allowable Pressure
100 to 150 psig (6,90 to 10,3 bar)
Approximate Weight
68 Series: 0.5 pound (0,23 kg)
168 Series: 3 pounds (1,36 kg)
168H Series: 5 pounds (2,27 kg)
Additional Technical Data
For additional technical information,
contact your local Sales Office or refer to technical documentation.
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