Application
Control valve designed as control and safety shut-off device for combustion plants burning liquid fuels dn 15 and dn 25 · Pn 16 and pn 40 · Up to 350 ° C.
Further versions
Bellows seal for temperatures up to 350 ° C, backup pack-ing and test connection control and quick-acting shut-off valve for gases, DIN/dvgw-tested (refer to t 8020 en)
Principle of operation
The process medium flows through the strainer (12) and the valve in the direction indicated by the arrow. In the standard version, the plug stem is sealed by a spring-loaded PTFE V-ring packing. In versions with a bellows seal, the plug stem is sealed by the bellows and an additional back packing. The test con -nection allows the bellows seal to be monitored for leakage.
The signal pressure pstacts on the pilot valve (11), the coil of which is connected to the safety interlock circuit (switch 14) of the furnace plant. During operation, the coil is energized and the signal pressure pst at port 1 (fig. 4 and fig. 5) acts on the diaphragm. In the event of a malfunction or power supply fail -ure, the pilot valve is de-energized and the signal pressure is vented over port 3. The force of the actuator springs closes the control valve in less than one second.
The control valve closes upon failure of the air supply indepen -dently from the electrical safety interlock circuit.
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.
