Butt Welding Globe Valve Testing machine

Butt Welding Globe Valve Testing Machine

YFJ-L type vertical valve test bench is designed to test different end type of the industrial valves, including the gate valve, globe valve, check valve, ball valve, etc.

This YFJ-L150 valve test bench is customized to test small sizes butt welding globe valve as per customer request. The work table can submerged into the water tank. the beam also can rotated to 90 degree for easily loading and discharge the valves.

You can finish the pressure valve testing as per the standard of API598, see below details:

The API standard 598: Valve Inspection and Testing, covers the testing and inspection requirements for gate, globe, check, ball, plug and butterfly valves. It has acceptable leakage rates for liquid as well as gas testing. All valves built to the various API standards are required to meet API-598 leakage criteria prior to shipment from the manufacturer or supplier.

API 598 states for shell and BACK SEAT tests, no visible leakage is permitted. If the fluid is a liquid, there shall be no visible evidence of drops or wetting of the external surfaces (no visible leakage through the body, body liner, if any, and body-to-bonnet joint and no structural damage).

If the test fluid is air or gas, no leakage shall be revealed by the established detection method. For both the low-pressure closure test and the high-pressure closure test, visual evidence of leakage through the disk, behind the seat rings, or past the shaft seals (of valves that have this feature) is not permitted (Plastic deformation of resilient seats and seals is not considered structural damage). The allowable rate for leakage of test fluid past the seats, for the duration of the tests, is listed in the following table:

General notes..

• 1 milliliter is considered equivalent to 16 drops.
• For check valves larger than NPS 24, the allowable leakage rate
  shall be per agreement between purchaser and manufacturer.

Notes:

1. There shall be no leakage for the minimum specified test duration. For liquid test, 0 drop means no visible leakage per minimum specified test duration. For gas test, 0 bubble means less then 1 bubble per minimum specified test duration.
2. The maximum permissible leakage rate shall be 0.18 cubic inch (3 cubic centimeters) per minute per inch of nominal pipe size.
3. The maximum permissible leakage rates shall be 1.5 standard cubic feet (0.042 cubic meter) of gas per hour per inch of nominal pipe size.

If you need any more information about the valve testing, please contact info@dorytestbench.com for more information.