Used to eliminate excessive pump thread (pressure) when most radiator valves are closed due to reduced demand. The differential pressure regulator controls flow through a bypass line between supply and return sides of a hydronic specialty heating system. The control valve maintains a constant differential pressure between the two sides by allowing flow through the bypass whenever the difference between the supply and the return exceeds the setpoint.

• Provides silent, trouble-free service
• Easy installation; requires no electrical hookup
• Easy adjustment of pressure by turning regulating cap
• Built-in differential pressure indicator
• Brass valve body with thermoplastic and stainless steel parts
• Diaphragm of EPDM