General Description:
Flowtek sleeve soft sealing plug valves are suitable for use in various kind of pipelines with working conditions as normal pressure of class 150 – 600 (PN16 – PN100) and working temperature of -29 / +180 deg.C in such industries as petrochemical, chemistry, pharmacy, chemical fertilizer, and power plant, etc. To cut off or turn on the flow medium in the pipelines.
Design Standard:
Basic Design: API6D / API599 / BS5353 / GB/T22130
Face-Face / End-End dimension: API 6D, ASME B16.10, EN 558
Flange / BW Ends Dimension: ASME B16.5, EN 1092, ASME B16.25
NPT Ends: ASME B1. 20.1
Fire protection: API607
Test: API 6D, BS 6755, API 607, API 6FA
Products Range:
Size: 2″ ~ 16″
Rating: ANSI 150lb ~ 600lb
Body Materials: Carbon steel, Stainless steel, Alloy
Trim: WCB+Nitriding, CF8, CF8M, CF3, CF3M, 4A, 5A, INCONEL625
Seat: PTFE, R-PTFE, TFM1600, NYLON, PEEK, PPL
Operation: Lever, Gear, Motor, Pneumatic operator
Design Feature:
Full port or Reduce port
Fire safe design
Double block & bleed
Emergency sealant injection
Cavity pressure self relief
Blowout-proof stem
Anti-static
Application:
On shore Oil & Gas
Off shore Oil & Gas
Refinery
Chemical
Petrochemical
Power plant
Structure features
1. The inlet and outlet bores are designed as such that there features the structure of double sealing grooves with sealing rings, thus the sealing pressure ratio between sealing parts grades during the circum rotation of the plug until the position of fully opening or closing is reached, when the enough pressure ratio is generated between sealing parts to reach zero leakage.
2. The structure of double sealing grooves with sealing rings not only can make the PTFE liner steady in the valve body without displacement, but also can absorb the tiny distortion of the liner due to the temperature change.Meanwhile, the forceful fiction action between the liner and the plug can advance the service life of the sealing surfaces.
3. There is a combination on the top of the plug sharft, i.e.. the PTFE membrane with an O ring and the adjusting gasket, which can adjust the pressure ratio between sealing surfaces to easily rotate the plug while ensuring the air proof of both the outlet and the middle flanges.
4. The complete sealing process can almost be considered nothing to do with the pressure inside the pipeline.
5. Different filing material is adopted for the PTFE liner according to the application temperature and working medium, being good in lubrication and long in service life.
