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The function of a Packless Valve is to control flow or provide
isolation in liquid or gas applications. Packless Valves are also
suitable for use in vacuum applications.
Henry Technologies’ Packless Valves are used in a variety of air conditioning
and refrigeration applications for isolating, flow control, charging and purging
purposes. The standard series Packless Valves are suitable for use with
HCFC and HFC refrigerants, and their associated oils, as well as other
industrial fluids non-corrosive to brass, phosphor bronze, copper, stainless
steel, nylon and monel.
Heat stabilized nylon seat ring for positive shut-off
Positive back-seating with valve in open position
Raised seat reduces debris induced sealing issues
Large diameter diaphragm for greater lift, better flow and longer life
Hermetic seal between bonnet, diaphragms and body
Suitable for vacuum applications
Diaphragms are changeable under line pressure
Bi-directional flow (see additional information)
Maximum working pressure = 500 PSI (34.5 Bar)
Allowable working temperature = -20°F to +275°F (-29°C to +135°C)
The standard series globe and angle Packless Valves are designed in
conformance with MIL-V-20064E and Military Standards MS-35880, MS-
35881 and MS-35883.
Materials of Construction - Standard series
The valve body and bonnet are made from brass. The lower stem is made
from brass for all models except the 629 series, where the material is monel.
The upper stem, stem cap and valve springs are made from stainless steel.
The seat ring is made from nylon for all models except the 629 series. These
models use a stainless steel seat ring. The diaphragm set is composed of
both phosphor bronze and stainless steel. The hand-wheel is made from die
Conn Size (inch)
1/4 ODS x 1/4 SAE Flare
3/8 ODS x 3/8 SAE Flare
1/2 ODS x 1/2 SAE Flare
5/8 ODS x 5/8 SAE Flare
Inlet ODS Connection
Outlet SAE Flare Connection
Integral Seal Cap
Mounting Flange Detail