629-series Henry Globe Hand Expansion Valves, Standard Packless Valves

Packless valves are so called due to the absence of a packed gland for stem sealing. Instead, metal diaphragms are used to isolate the stem from the fluid area.

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 valves are suitable for HCFC and HFC refrigerants, along with their associated oils. The 2100B & 2111B series are suitable for HCFC, HFC and CO₂ refrigerants along with their associated oils.

Main features

• Robust design
• Compact
• Heat stabilised 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

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 white metal.