Create and Control Pressure

Vacuum

Pulling a vacuum in the field can be challenging but Ralston Instruments vacuum pumps and multi-function pumps are up to the task.

Range 0-25 Inches Hg vacuum

• Calibrate vacuum transmitters without an external pressure source
• Control vacuum precisely using integral fine adjustment piston
• Create a very stable vacuum source for calibration

Vacuum Cylinder Hand Pumps and Pneumatic Pressure / Vacuum Cylinder Hand Pumps

Low pneumatic (air) pressure

Ralston Instruments has several products that make doing the difficult job generating and controlling low pressure easier.

Range 0-100 psi

• Perform differential pressure calibration easily
• Generate pressure without an external pressure source
• Calibrate devices in both liquid and gas systems
• No messy liquids to contaminate a gas system

Read more at Pneumatic Cylinder Hand Pumps and Pneumatic Pressure/Vacuum Hand Pumps.

Medium pneumatic (air) pressure

Whether it is testing relief valves or checking pressure gauges Ralston Instruments has a wide selection of medium pressure pumps.

Range 0-300 psi

• Good solution for testing relief valves
• Test pressure in gas distribution lines
• No external pressure source necessary
• Calibrate gas or liquid pressure transmitters with air

Pneumatic Scissor Hand Pumps

Hydraulic pressure

For higher pressure applications Ralston Instruments offers hydraulic pumps for use with an attached gauge or with an external pressure calibrator

Range 0-5000 psi

• Calibrate pressure gauges, switches, transmitters or relief valves in liquid or gas systems
• Generate higher pressure than with any pneumatic pump
• Easily pressurize a large volume system

Hydraulic Hand Pumps

Control nitrogen pressure

To get the most stable reading at high pressure you need to use one of Ralston Instruments’ nitrogen calibration solutions.

Range 0-5000 psi

• Control nitrogen pressure using an external or internal nitrogen cylinder
• Perform both differential pressure using a variable volume
• Do static pressure by charging the system with nitrogen then controlling pressure with a variable volume

Pressure Control