Isolation valves have been specifically designed for use with liquid level gauges and are available in a variety of materials, for temperature and pressure ranges to meet most specifications.
Valves are available in both straight and offset pattern designs with outside screw and yolk (OS&Y) or inside screw configurations and have a selection of vessel and gauge connections to fit a variety of mounting requirements.
A standard feature with Valves is the automatic safety ball checks. In the event of the glass breaking the ball check seats to prevent the loss of vessel contents.
All valves may be repacked under pressure with the back seating arrangement ensuring complete shut off. A typical selection of valve types / arrangements can be seen below with other arrangements.