Gresham Gas Sampling services

All FOX-VPS actuators are subjected to a stringent test regime prior to delivery. Utilising purpose built test rigs, actuators are initially pressure and leakage tested to a standard that exceeds ISO 10100:2001. They are then dynamically friction tested to verify that their ultra-low friction characteristics are uniform throughout the actuator stroke. The test comprises cycling the actuator from end to end at extremely low speed using a servo valve under position control, whilst simultaneously measuring the differential pressure across the piston. A plot is then generated of position vs pressure, an example of which is shown below.

FOX-VPS provides a full repair and overhaul service for its own and other manufacturer’s actuators.

With our own in-house design team FOX-VPS can reverse engineer parts to refurbish units and update actuators completely when required. These actuators would go through the same design process and testing requirements as newly designed units, with full function test and flushing where required.