Pilot-Operated Diaphragm Valves

A pilot-operated diaphragm valve is used to provide automatic shutoff of main line gas when there is an unstable pilot flame or no flame at all. These valves are operated by electrical energy (millivoltage) produced by the pilot generator. Their operation is controlled by the room thermostat, limit devices, and other operating controls.

The ITT General Controls B60 gas valve (see Figure 5-43) is an example of a pilot-operated diaphragm valve commonly used with gas-fired heating equipment. Where 100 percent shutoff is required, it should be used in conjunction with a thermopilot valve (see Figure 5-44).

3 Replies to “Pilot-Operated Diaphragm Valves”

  1. I found your post to be very helpful. I have a gravity furnace with a General Controls gas valve Catalog No. B60Y65H and Serial No. M7 B 28. Above these two numbers in a separate box are the letters “GLP”. Can you identify the Pilot Generator I would need for this Gas Valve? Please help! Thanks for your time!

  2. Could you send me the wiring schematic for this valve. Just replace pilot lite & generator can hear the clicking insise of gas valve but furnace will not ignite.

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