Diaphragm Poppet Valves

Wat is een Diaphragm Poppet Valve?

A diaphragm poppet valve uses a flexible diaphragm that closes or opens a poppet.
Thanks to this smart design:

• the valve moves virtually without friction,
• hardly any force is needed to switch,
• the medium is always sealed leak-tight (bubble-tight),
• is vervuiling minder kritisch dan bij traditionele schuif- of plunjerkleppen.

Humphrey's design is known as:

"Cannot Stick. Will Not Leak."

The result is an extremely robust, quiet and reliable valve, ideal for applications with low pressure, vacuum, precision control and sensitive media.

Waarom Humphrey Diaphragm Poppet Valves?

• Perfect sealing: no internal leakage
• Fast switching times (typically 7–25 ms for solenoid versions)
• Very long service life, no metal sliding parts
• High flow in a compact size (Cv up to 4,33 on large models)
• Little to no maintenance
• Suitable for air, inert gas, light liquids and vacuum
• Stable performance, even at low pressure
• Manifold mounting possible
• Energy-efficient (low coil wattage)

Toepassingen in Nederland & België:

• Measurement & analysis technology
• Medical equipment
• Gas distribution
• Test and calibration systems
• Machine building & OEM
• Vacuum technology
• Laboratory automation
• Process instrumentation

Solenoid Diaphragm Poppet Valves (Internal Air Pilot)

Electrical actuation, high reliability, for air & inert gas

Models:

• B250E1 (1/4")
• B500E1 (1/2")
• B590E1 (3/4")

Functions:

• 2-weg or 3-weg
• Normally closed (NC) or normally open (NO)

Advantages:

• Robust in contaminated or difficult air environments
• No lubrication required
• Frictionless design, high switching force
• DIN or lead-wire connection
• Easy inline mounting

Technical specifications (summary):

• Pressure range: 30–125 PSI (NC)
• Flow capacity: 60 – 220 SCFM depending on model
• Cv values: 0.83 (B250) to 4.33 (B590)
• Voltages: 12 VDC, 24 VDC, 120 VAC
• Materials: zinc diecast / aluminium, stainless steel, NBR

These valves are ideal for machine builders, pneumatic circuits and industrial automation.

External Air Pilot Solenoid Valves

For low pressure, liquids & special media

Models:

• B250AE1 (1/4")
• B500AE1 (1/2")
• B590AE1 (3/4")

Pilot port: #10-32 UNF
Pilot pressure: min. 30 PSI

Applications:

• Low-pressure air
• Inert gas
• Mild liquids (aqueous media, light process liquids)
• Pneumatic process automation

Advantages:

• Reliable switching even at low operating pressure
• Brass housing (more chemically resistant)
• Better control of liquids than traditional solenoid valves
• Fast response & quiet operation

Technical specifications:

• Pressure range gas: 0–100 PSI
• Pressure range liquid: 0–60 PSI
• Cv: 0.83 to 4.33
• Materials: brass, stainless steel, NBR / FKM / EPDM

External Air Pilot Vacuum Valves

Perfect sealing in vacuum applications, high reliability

Models:

• VAB250AE1 (1/4")
• VAB500AE1 (1/2")
• VAB590AE1 (3/4")

Advantages:

• The higher the vacuum, the better the seal
• Large venting port for fast venting (quick dump)
• Ideal for dry, humid or contaminated vacuum systems
• FKM diaphragms as standard

Specifications:

• Operating range: 0 – 29.5” Hg
• Pilot pressure: ≥ 30 PSI
• Materials: brass, aluminium/zinc diecast, FKM

Toepassingen: pick-and-place, vacuümhandling, lekkagetestsystemen, semiconductor productie.

Manual & Mechanical Diaphragm Poppet Valves

Manual operation for direct local control

Available series:

• M-Series: manual toggle, push button (e.g. M12, M31, M32)
• K-Series: knob operation (e.g. K4, K41, K42)
• H-Series: mechanically operated (roller, plunger, lever; e.g. H12, H31, H41)
• MMV/MPV Series: compact 2-weg and 3-weg diaphragm valve versions

Advantages:

• Extremely low operating force
• Ideal for panels & calibration units
• Perfect sealing without wear parts
• No leakage; no maintenance
• Precise manual control of pressure, flow or vacuum

Applications: test setups, laboratories, bypass control, service panels.

Overview of product codes (all diaphragm poppet models)