GAS TURBINE QUICK-CLOSING VALVE
TYPE KVH-HT

Especially designed for use during the emergency shut-down (ESD) of gas turbines, valve type KVH-HT features highest reliability in regards to safe quick shut-down. The corresponding design features adapted to this specific application guarantee optimised closing times significantly below 1 second and allow switching of high differential pressures whereby absolute valve tightness is guaranteed in usual manner.

Application areas

  • Automatic shut-off valve with pneumatic actuator with fast-close operation in case of breakdown of the auxiliary energy for gas burners and gas appliances with EC-Type-Examination-Certificate in acc. with
    Gas Appliances Directive
  • Quick acting safety shut-off valve for gaseous fuels, gas-burners and gas appliances with EC-Type-Examination (Module B) in acc. with PED
  • Automatic shut-off valve in pipe systems in accordance with DIN EN 746-2 Industrial thermo-processing equipment
  • As a control element for the fuel mass flow rate to control the combustion performance according to
    DIN EN 12 952-8 para. 4.4.1
  • Combustion systems for liquid and gaseous fuels in accordance with DIN EN 12 953-7
  • Pipe systems for gaseous media and fuels in all industrial sectors
Nominal size: DN 3" to DN 12"
Operating pressure: max. 50.0 bar g
Operating temperature: max. + 225°C


Advantages

  • Closing time < 1 second
  • Suitable for high operating temperature of max. + 225°C
  • Pressure balanced design for high differential pressures
  • Heavy duty design for high amount of operating cycles
  • High-performance valve with a long service life

Function
The quick-closing valve is actuated by a pneumatic actuator with a solenoid control valve. Automatic quick-closing is carried out by the installed spring force in less than 1 second. The valve cone with soft sealing element guarantees absolute tightness (leakage rate A in acc. with EN 12266-1).

Technical features

Valve body: Globe valve body made of forged or cast steel
Seat sealing system: Soft seal: Specialized PTFE sealing elements, valve seat cladded with stainless steel
Stem sealing: Automatic  sealing set from special compound with secondary sealing and test connection G 1/8
Actuator type: Integral KÜHME pneumatic piston actuator for linear movement with fail close function by means of spring force, controlled via electro-pneumatic 3/2-way solenoid valve
Process connection: Alternatively with welding ends or flange connection, both available in EN or ANSI design
Special features:
  • Type-tested valve in acc. with PED and Gas Appliances Directive,
    test base DIN EN 13611 / DIN EN 161 / DIN EN 16678
  • Closing time less than 1 second
  • Sealing system certified in acc. with Clean Air Guidelines (TA-Luft) / ISO 15 848-1
  • Valve optionally available in ATEX design
  • Valve optionally available in SIL 2 design, certified
  • Optionally with adjustable (5 to 20 sec.) hydraulic opening delay and throttling plug for smooth start-up operation (see type KVH/R-HT)
  • Optionally available as entirely pre-mounted quick closing valve combination with intermediate vent valve (double block and bleed valve assembly)
  • Available also as customised valve solution for extreme operating conditions and special applications - We are looking forward to answer your questions!