BELLOW SEAL VALVES
Bellow-sealed Gate and Globe Valves
Gate Valves: 2" to 24" (50 mm to 600 mm)
Class 150 to 600
API 600 (Gate), API 623 (Globe), MSS SP-117
- Fugitive Emissions - Complies to ISO 15848-1: 2006 Class AH leakage
- SIL3 Safety Integrity Level for Automated Valves
- The bellows lifecycle is designed as per MSS SP-117
Features that Add Value:
Metal bellows seal the moving stem and increase the durability of packed stem seal valves
Bellow provides a barrier between the stem at its point of entry through the pressure boundary and the process fluid within the valve, to eliminate stem leakage
An anti-rotation device is provided in the bonnet to ensure bellow does not get twisted during assembly and disassembly or by vibration
Bellow-sealed valves are usually leak tested using a mass spectrometer to detect leakage rates below 1x10E-06 std.cc/sec.
Bellow-sealed bonnets are backed up with a standard stem packing set and a leakage monitoring port between the bellows and the packing in order to prevent a catastrophic release of hazardous fluid in the event of a bellows leak.
ASTM Specifications, Carbon Steel, Alloy Steel, Stainless Steel, other special material.
|Trims :||Varieties of combinations|
|Operator :||Hand wheel,Gear|
|Note :||OS & Y Type,Bolted or sealed bonnet,Full bore or Reduced bore,Long life cycle (10000 cycles) tested bellows, Back seat and gland seal arrangement,Guided plug & stem and non-torsion bellows,Body testing as per bellow
|Optional :||Leak detecting arrangement|
|Range||Bellow Seal Cast Globe Valves|
|Range||Bellow Seal Forged Valves|
|inches||-||-||1/2"- 1 ½ "||-||-||-|