Contact person
Tom Lindström
Projektledare
Contact Tom
Valves
Shut-off valves for district heating networks are tested for tightness, strength and opening and closing torque.
Purpose
To test long-term properties in the form of tightness and manoeuvrability, cycling tests are conducted with opening and closing. Testing in accordance with European standard EN 488: 2019 may form the basis for certification according to the Euroheat & Power certification program EHP 003. RISE is a test institute and certification body according to EHP 003 approved by Euroheat & Power.
Valves for other applications in the industry can also be tested in a similar way.
Certification takes place according to the European industry standard EHP 003, which is based on testing according to the European standard EN 488: 2019. A certified valve is therefore attractive in the entire European market.
Valves up to a size of DN 1000 can be tested, which means that valves up to DN 2000 can be certified according to EHP 003.
A tested and certified valve proves quality and that the valve can maintain high performance for a long time.
Method
Cycling and manoeuvring test according to EN 488: 2019. The test method EN 488: 2019 is intended for stretch limit valves which may be subjected to high axial expansion forces from connecting district heating systems. The valve is operated under load and the opening and closing torque and the tightness after the test are checked. The testing is supplemented by continuous checks at the manufacturer, which ensures that the valves produced are of the same quality as the specimens tested. An EHP 003 certificate is valid for 6 years. In the test rig we can pressurize the whole system up to 24 bar. For pressure testing of only the valve, we can use other equipment and reach up to 40 bar. We measure torque on the valve up to 15000 Nm. The equipment can apply up to 20 MN of axial power, and up to 8 MN in tension. There are also opportunities to test four-point bending moments.
Density test according to EN 12266-1 from Rate A (no measurable leakage) to Rate G (2.0 * DN mm3 / s).
Certification according to Euroheat & Power's certification program EHP 003.
Deliveries
Close contact with the customer how the test set-up should be carried. After evaluation of the results, a report is written. The report is reviewed and if the results meet the requirements, an EPH 003 certificate is written.
