Valves & actuators
Solenoid Valve Replacement Guide
Port size and coil voltage are only the start. A defensible solenoid-valve replacement also needs the same function, normal state, pressure behavior, flow capacity, materials, seals, fluid compatibility, and electrical interface.
Record the body model, coil model, voltage/frequency marking, and any suffixes or options.
Identify 2-way, 3-way, or other function; normally open or normally closed state; and direct, assisted, or pilot operation.
Record port size, thread or connection standard, number of ports, manifold/subbase arrangement, and flow direction.
Capture AC/DC voltage, frequency where applicable, coil wattage, connector/conduit style, lead configuration, and control method.
Record minimum and maximum operating pressure differential, system pressure, orifice, Cv or flow requirement, and back pressure.
Record fluid or gas, temperature, body material, seal material, cleanliness, and compatibility requirements.
The replacement must create the same flow path in both energized and de-energized states.
Pilot-operated valves can require a minimum pressure differential that direct-acting valves do not.
Port size alone does not establish equivalent Cv, orifice, pressure drop, or capacity.
Voltage, AC/DC type, frequency, coil power, connector, and control output must match the system.
Body and seal materials must be compatible with the fluid, pressure, ambient, and fluid temperature.
Parker product data shows valves with the same general family can differ in orifice, Cv, pressure differential, materials, seals, and actuation type.
An internally piloted valve may not operate correctly in a low-pressure or zero-differential application.
Voltage alone does not establish frequency, wattage, connector, insulation, or control compatibility.
Flow path, pressure limits, response, orifice, materials, and pilot architecture can still differ.
Not safely from those two fields alone. Verify function, normal state, pressure differential, Cv/orifice, fluid, body and seal materials, temperature, and electrical interface.
Some pilot-operated valves depend on system differential pressure to shift or seal correctly, while direct-acting designs can operate differently.
Not automatically. The valve must produce the required flow and pressure behavior without disrupting the process, actuator, or control system.