Will not leak.  Cannot stick.

Humphrey's classic "Diaphragm- Poppet" valves offer a unique value and were an entry product for Humphrey into fluid power and pneumatics back in 1957.

Exceptional Value

• Unique design is simple. Touble free.
• Value does not leak. Seals tight.

Tough, Dependable

• Value has no sliding seals, Cannot stick.
• Works with clean or poor air, and inert media.

Broad Product Offering

• 2-,3- and 4-way types. Port sizes: 1/8,1/4,1/2 and 3/4/
• Solenoid-Pilot, manual, mechanical and air operated models.

How it Works

Compressed air to the SUPPLY port, fills bottom cavity (BLUE), and underside of the bottom diaphragm, causing the poppet to seat and seal. VALVE WILL NOT LEAK.

Valve actuation (at top) overcomes force to the underside of the bottom diaphragm, and opens flow to the COMMON port. High flow, no sliding seals. VALVE CANNOT STICK.

Releasing the actuation permits bottom diaphragm to begin valve closing. Compressed air assists valve shift. Exhausting pressure under the top diaphragm (GREEN) assists the position change and creates “Quick Dump” feature to EXHAUST.

Note: Design provides an excellent, leak free, two-way function with plugged Exhaust port.

Application Examples:

• Industrial Automation: Rugged, Reliable. Withstands difficult conditions.
• Petrochemical: Simple design works well in demanding media and harsh environments.
• Medical: Inert construction and leak proof. Ideal for clean/alternative media.
• Transportation: Long history of reliability in extreme conditions and climates.
• Food and Beverage: Preforms well with moisture laden air. No sticking.

Download Humphrey's Brochure.