Master Low Pressure with Ultra-Precise Control
Generate low pressure up to 125 psi or draw a vacuum to -15 psi for calibrating low pressure or vacuum instrumentation. We offer a complete line of portable pneumatic cylinder hand pumps that let you dial in test pressures to within .01% of scale, giving you extreme accuracy even at very low pressures.
All Ralston pneumatic cylinder pump bodies are made from rugged anodized aluminium, so they’re lightweight, they don’t rust or corrode, and they can easily handle sand, sticks or other contaminants in the field. The modular design makes field maintenance quick and easy, and every pump includes our Quick-test hoses and adapters, for fast, easy connectivity without the need for thread tape.
0 to 125 psi (0 to 860 kPa)
An economical solution for performing the low side calibration of pressure transmitters or measuring differential pressure on pipelines and other vital industrial process systems.
-23 inHg to 125 psi (-78 kPa to 860 kPa)
A uniquely designed pump with the flexibility to convert from pressure to vacuum with the simple twist of a knob.
0 to -23 inHg (0 to -78 kPa)
The smart choice for moderate vacuum applications like zeroing a transmitter or gauge that reads greater than zero when vented.
Pair your pneumatic cylinder hand pumps with a Ralston Digital Pressure Gauge reference for a complete test kit.