Design and principle of opera-tion
The Type 3241-1 and Type 3241-7 Pneu-matic Control Valves consist of a Type 3241
Single-seated Globe Valve and either a Type 3271 or Type 3277 Pneumatic Actua -tor.
Thanks to the modular design, the actuators Can be exchanged, and the standard version Of the valve can be supplemented to form a Version with insulating section or metal bel -lows seal.
In the micro-flow valveversion, a micro-trim Element is installed in the valve body instead Of the usual seat-plug assembly.
The process medium flows through the valve In the direction indicated by the arrow. The Position of the plug (3) determines the flow Through the valve seat (2). The position of
The plug (3) is changed by the signal pres-sure acting on the diaphragm of the actua-tor (bench range). Plug (3) and actuator
Stem (8.1) are connected by the stem con-nector (7) and sealed by the spring-loaded
Ring packing (4.2).
Fail-safe position
The control valve provides two different
Fail-safe positions depending on the ar-rangement of the springs in the actuator:
Actuator stem extends
When the signal pressure is reduced or the Power supply or signal fails, the springs Move the actuator stem downwards and Close the valve.
When the signal pressure increases again, The valve opens acting against the force of The springs.
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.
