Extreme Temperature Needle Valve

HT, LT & PV Series Severe Temperature Needle valves to 60,000 psi (4137 bar)


Since 1945 Parker Autoclave Engineers has designed and built premium quality valves, fittings and tubing. Parker Autoclave Engineers HT, LT and PV series valves are used in operating conditions from -423°F to 1200°F (-253°C to 649°C) and up to 60,000 psi (4137bar). These valves are used where extreme high and low process temperatures prevent the use of standard design valves.


  • Tubing sizes from 1/8" to 1".

  • HT Extended stuffing box option to 1200ºF (649ºC)

  • LT Extended stuffing box option to -423ºF (-253ºC)

  • PV option encorporates graphite yarn packing in a standard valve body to 1200ºF (649ºC)

  • Non rotating stem

  • Packing below the stem threads.

  • Extended packing housing

Parker Autoclave Engineers extreme temperature valves are designed for applications in extreme temperatures. The HT and LT valves are designed with an extended housing removing the pack from the process allowing the valve to operate at these temperatures. The PV valves are a more economic high temperature designed for the power industry. These valves are complemented by a complete line of fittings, tubing and accessories.

Extreme Temperature Needle Valves