HPVA II High Pressure Volmetric Analyzer

HPVA II System Overview

Bookmark and Share

 

Four Methods of Sample Temperature Control

  • Refrigerated/heated recirculation vessel (customer provides temperature control bath)
  • Four-liter, stainless-steel dewar for liquid cryogen
  • Furnance allows for experiments ranging up to 500 °C
  • Cryostat can precisely control sample temperatures from ambient conditions to 30 K

HPVA II system overview diagram

Manifold
All the valves in the manifold are pneumatically operated, high-pressure valves with Kel-F® seats. Valve tubing is constructed with heavy wall, 316L stainless steel and is attached via a VCR connection or welded. The temperature of the insulated manifold region is stabilized using a heater controlled by an adjustable PID controller.

Pressure Transducers
Two transducers are used to precisely measure the system pressure. A 1000- torr transducer is used to accurately monitor pressures below 1 atmosphere and is protected from high pressure with an isolation valve and a cracking valve that relieve to the vent.

Servo Valves
The servo valves are used to automatically regulate flow of the gas in the manifold to the vent and vacuum. Servo Valves The servo valves are used to automatically regulate flow of the gas in the manifold to the vent and vacuum.

Vacuum Systems
Consists of a mechanical pump and internal Pirani vacuum gauge. User can provide their own pump or purchase the high-vacuum turbo pump package.