FISHER 167DA-P118 Lock Valve / Switching Valves FISHER 167DA-P118 Three-Way Pneumatic Lock-Up Valve for Control Systems
FISHER 167DA-P118: Three-way pneumatic switching valve, 400 psig max, compact lock-up valve for actuator control.
Product Details
FISHER 167DA-P118 is a three-way pneumatic switching valve (lock-up valve) designed for pressure control and switching applications in industrial pneumatic control systems. Manufactured by Emerson, this valve is engineered to maintain or switch pneumatic pressure states, providing reliable fail-safe protection for control valve actuators when instrument air supply is interrupted.
The 167DA-P118 features a compact and lightweight design with 1/2 NPT port connections. The valve is available in aluminum body (Type 167DA) or stainless steel body (Type 167DAS) construction for corrosive service applications. It has a maximum inlet pressure of 400 psig (27.6 bar) for non-filter models and 250 psig (17.2 bar) for filter models, with a maximum emergency outlet pressure of 250 psig (17.2 bar).
Key features include internal pressure sensing for simplified installation, easy and accurate adjustment, and durable construction with corrosion-resistant fasteners. The temperature capability ranges from -40°F to 180°F (-40°C to 82°C) with standard NBR seals, and up to 300°F (149°C) with optional FKM (Viton) seals. Optional silicone rubber (VMQ) diaphragms with cold weather bolts extend the temperature range down to -60°F (-51°C). The 167DA-P118 is typically used to deliver constant reduced pressure to pilot-operated controllers and other pneumatic instrumentation, making it ideal for process control applications in oil and gas, chemical, and industrial manufacturing facilities.
