Catalogue

12 WSHP-PRC025D-EN
Features and Benefits
There are three features that every self-balancing valve should possess to accomplish the job of
automatically balancing an HVAC system in the industry.The valve should be:
• Non Clogging
• Quiet
• Accurate
Non-Clogging. The live flexing action of the elastomeric diaphragm against the orifice seat
permits passage of reasonably sized particles of sludge, rust balls, thread chips, and other debris.
Because the working parts are of a two piece design, they are resistant to fouling. Back pressure
forces the diaphragm away from the orifice seat allowing any debris to be back-flushed away. Hays
is the only balancing valve that provides unrestricted flow during back flush.
Quiet. By design, the Hays automatic balancing valve is inherently quiet.The only moving part
is an elastomeric polymer diaphragm in an orifice seat that is made from polyphenylsulfone.
Together, these materials have a natural sound deadening ability.The Hays valve neither clicks nor
is noisy, and has only one control range.
Accurate. What does accurate mean? Is it the stable, predictable delivery of thermal energy in a
hydronic system?The Hays valve is accurate ±10%, that equates to 99.8% heat transfer. Because
the polymer diaphragm compensates for changes in fluid temperature the valve provides stable
thermal system performance.The addition of antifreeze to the fluid further increases the need for
the offsetting characteristics of the Hays automatic valve.
Hose Kit Specifications
Ball Valve Flow Control
Each kit contains two manual flow control ball valves, two flexible hoses, and may include a high
flowY-ball strainer and various other accessories.
Flow Control
Each kit contains two manual ball valves, one Hays Measurmeter (with Venturi Cv insert) two
flexible hoses, and may include a high flowY-strainer and various other accessories.
The circuit setter valve body and ball valve are constructed from brass. It contains a maximum
working pressure of 400 psi with a maximum flow temperature of 40-200°F (operating temperature
range) and a minimum flow temperature of 15°F (-10°C).
Automatic Flow Control
Each kit contains a Hays Mesurflo® automatic flow control valve, two ball valves, two flexible
hoses, a high flowY-ball strainer, and includes a blow-down and various other accessories.