A throttling valve is not a control valve in the sense that it does not control downstream pressure. For most blowdown and many other applications, throttling valves are a smart option to consider.

In three-port valves, or shuttle valves, internal ridges guide the ball between ports. Restrictive flow regulators work like an automatic variable orifice to control flow by throttling or restricting.

Typically, the throttling is performed with a ball valve (although the British prefer a globe valve) and the measuring is accomplished with either a venturi or an orifice plate. The two components are ...

The valves are available in ½” through 4” sizes through ASME Class 4500. Standard forging materials include SA 105, SA 182-F22, SA 182-F91, SA 182-F92, and SA 182-F316. The venturi is an ...

CPT valves from Flowserve Corp., Dallas (flowserve.com), control steam pressure or pH levels, operate in cryogenic conditions and temperatures up to 1,000°F, and also meet EPA ...