Valve body made of:
Cast iron (DIN version only)
Cast steel or cast stainless steel
Principle of operation (figs. 3 and 4)
Depending on the valve version, the three-way valve can be used for either mixing or flow-diverting service.
In mixing valves, the process media to be mixed enter at valve ports a and b. The combined stream flows off at port ab (see fig. 3). The flow rate from port a or b to port ab depends on the cross-sectional area of flow between the seats and the valve plugs.
In flow-diverting valves, in contrast, the process medium enters at port ab and the partial streams flow off at ports a and b (seefig. 4).
Note: The design of the mixing and flow-diverting valves in sizes dn 15 to 25 (nps ½ To 1) is identical.
Fail-safe position depending on the arrangement of the compression springs in the actuator (see data sheet t 8310-1 en for details), the valve has two fail-safe positions which become effective upon supply air failure:
Actuator stem extends (fa)
Whenever the air supply fails, either port b (mixing valve) or port a (flow-diverting valve) is closed.
Actuator stem retracts(fe) whenever the air supply fails, either port a (mixing valve) or port b (flow-diverting valve) is closed.
Shanghai ThinkTank Process Management Co., Ltd. is the sole production and R&D institute of Taiwan STONE Company in Mainland China. ThinkTank entered Chinese market in 2002 and moved from Hangzhou to Shanghai headquarter in 2012. Based on over 30 years experience in researching and manufacturing automatic instruments, brining in overseas advanced technology and combining domestic users real working situation, ThinkTank is specialized in producing new typed self-regulating valves, control valves and various kinds of automatic instruments. ThinkTank's business includes engineering projects such as electricity, metallurgy, petrochemical processing, light industry and building materials, municipal water service and natural gas.
Enterprise history
1985.08 Taiwan STONE company was established in Taipei city.
1990.02 Sales network covered Southeast Asia.
2002.06 Branch office was fund in Hangzhou, Zhejiang, handling all business in China
2012.10 Mainland head office was moved to Pudong, Shanghai
Shanghai ThinkTank Process Management Co., Ltd. Has a professional team works for control valves design and engineering application. ThinkTank develops a series of hi-tech products after absorbing overseas advanced technology and innovating.
*New self-regulating, micro pressure, differential pressure, flow, temperature control valve
*New pneumatic (electric) linear actuator (low dB, high pressure) control valve
*Pneumatic (electric) rotary actuator (O/V ball, butterfly) control valve
*Pneumatic (electric) special corrosion resisting control valve
Shanghai ThinkTank Process Management Co., Ltd sticks to the policy of "client oriented, quality comes first, and faith is root". Depending on many years experience on engineering application in various industries, ThinkTank provide clients with good, reliable full service, focusing on maximizing the rate of return on investment for clients.
