General Description:
Leakage from the valve gland (stem packing) is often a problem for environmental protection & sometime it is quite dangerous if such leakage is from a hazardous fluid or gas. FLOWTEK bellow sealed valves are designed with a bellow cartridge which welded to the valve bonnet and stem, so that when the stem up & down movement makes the bellows expands & compress. Therefore there is no sliding or rotating seals through which process fluid can leak.

Design Standard:
Design and Manufacture: API 602, ASME B16.34, BS 5352
Face to Face Dimension: ASME B16.10, EN558 (Threaded Ends and Socket Welded ends as per manufacture’s specification)
Flange Connection Dimension: ASME B16.5
BW Connection Dimension: ASME B16.25
Threaded Ends Dimension: ASME B1.20.1
Socket Welded Ends Dimension: ASME B16.11
Pressure-Temperature Ratings: ASME B16.34
Test & Inspection: API 598
Other: NACE MR01-75, Low Emission Test

Design Feature:
The product is a solid wedge with an expansion seat ring and a graphite stem packing for secondary sealing, which can ensure zero stem discharge and trouble-free cycles of less than 5,000 times

Application:
Can be used in general industries, including oil refineries, petrochemical and solar power plants, to ensure the supply of hot oil and steam.