A.T. Technical Services’ test units for pressure safety valves

March 2014 Valves, Actuators & Pump Control

The A.T. Technical Services MP3-SRV-FL is a complete solution for testing vacuum and low and high pressure relief devices in gas and liquid services. This versatile test unit features three test solutions:

* Clamping and test facility for gas service.

* Clamping and test facility for liquid service.

* Clamping and test facility for pressure/vacuum service.

Features include analogue, digital or semi-automatic (computerised) test systems set pressure, seat tightness and general performance with gases or liquids. The test units can also be equipped for breather valves and other tank safety valves up to 600 mm.

To achieve a strong flow rate and create a significant or even full lift effect, the high pressure gas test facility is completed with a 150 litter PED or ASME test vessel. The 50 mm connection line to the inlet of the clamped valve is competed with an actuator controlled ball valve which can be closed at the end of the test to save the remaining pressure in the vessel for use during the next test. The high pressure liquid test system is also completed with a large size vessel to achieve a steady stream test effect. The volume of the vessel’s results is a strong and dynamic lift effect and ‘cushioning’ when the disc reseats. Both gas and liquid 3-claw clamping systems can apply a clamping force up to 25 tons and are suitable for the range DN15-250. The universal, hand-operated clamping table in the front is specially designed and equipped for pressure/vacuum (breather) valves.

Other standard features and options include:

* Stainless steel control panel.

* Safety screens.

* Interlock systems to prevent release of claws when test circuit is pressurised.

* High pressure gas compressor station with air receivers.

* Computer registration system.

* Auto test system, auto control of ramp rate to meet ASME ramp rate requirements.

* Portable grinding/lapping machine.

* Liquid test station with J-tube design.

* Skid mounted.

Delivery time is 8-10 weeks.

For more information contact Chantell Swanepoel, A.T. Technical Services, 086 100 2887, admin@atts.co.za, www.atts.co.za

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