Wafer Triple-offset Sealing Butterfly Valve

When JSV valve triple-offset sealing butterfly valve in a fully open state, the butterfly plate sealing surface will
Sealing performance:
bi-direction sealing
Working temperature:
according sealing material using temperature
Actuator:
can be configured pneumatic, hydraulic, electric actuators or manual worm, handle
Size Range:
2”-96”
Pressure Range:
ASME 150 - ASME 600(Series M-BFV033-ASME 150 )
Body style:
Wafer, Lug and double flange
Valve size:
2”-96”
Connect type:
wafer
Nominal pressure:
ANSI 150#,300#,600#
Standard:
API; ISO; DIN; JIS
Material:
Stainless steel, cast iron or ductile iron
Vacuum rating:
1.016*10^-3mm(4*10^-5in)Hg
Temperature rating:
According to sealing surface material temperature
Sealing structure:
Multiple metal sealing, metal-to-metal sealing, PTFE sealing
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    When JSV valve triple-offset sealing butterfly valve in a fully open state, the butterfly plate sealing surface will be completely out of the valve seat sealing surface, and the butterfly plate seal and the valve body seal between the formation of double eccentric seal butterfly valve with the same gap,Due to the sealing surface angle offset will make the length and length of the radius of the butterfly plate to the size of the semicircle, the butterfly plate sealing surface rotation trajectory and the valve seat sealing surface to form an angle. When the disc is open, the sealing surface of the disc is immediately removed from the sealing surface of the valve seat. When the disc is closed, only in the closed moment, the butterfly plate sealing surface will contact and press the valve seat sealing surface, thus eliminating the mechanical seal of the seal and bruises. Three eccentric structure so that the closure of the butterfly plate when the seal between the two sealing surface seal pressure can be generated by the conventional valve seat elasticity coupled to the valve stem drive torque generated, not only clear the elastic material aging, failure. But also by the external drive torque changes to achieve its seal than the pressure of any adjustment, so that the sealing performance and service life has been greatly improved.

  1. Compared to other valves. the structure length is shorter and lighter weight
  2. Triple-offset structure make the valve seat and butterfly plate almost no friction, no wear and longer life. open torque is smaller, saving effort
  3. Triple-offset structure make the butterfly board more and more tight, better sealed, to get good leak without leakage effect
  4. Multi-level sealing structure of the butterfly plate seal with multi-level composite material, with metal hard seal and elastic seal of the double advantages, both in the case of low temperature and high temperature, sealing performance is reliable, no leakage
  5. Seal ring by the pressure plate caught in the butterfly plate, easy to install, adjust and replace
  6. Between the stem and the valve body with the sleeve, so that the valve open and close easily, support reliable, good strength, long life.Stem shaft end with nuts, cork pin mechanism to prevent the stem when moving

Design standard

Design basis GB API DIN
Valve design standard JB/T 8527, GB/T 12238 API 609 BS5155
Face to face length GB/T 12221 API 609 ISO5752
Flange standard GB/T 9113.1 ANSI B 16.5 ANSI B 16.47 SERIES B/A EN 1092
Test and check GB/T 13927 API 598 ISO5208

Product execution standard

/ Design criteria Flange connection size Length of the structure Inspection and test
GB JB/T 8527, GB/T 12238 GB/T 9113.1 GB/T 12221 GB/T 13927
API API 609 ANSI B 16.5 ANSI B 16.47 SERIES B/A API 609 API 598

Performance specification

Nominal pressure PN(Mpa)  0.6 1.0 1.6 2.5 4.0 6.4
Test pressure Shell Mpa 0.9 1.5 2.4 3.75 6.0 9.6
Water 0.66 1.1 1.76 2.75 4.4 5.0
Air 0.6
  CLASS(Mpa) 150(2 Mpa) 300(5 Mpa)
Test pressure Shell Mpa 3 7.5
Water 2.2 5.5
Air 0.6

Flow coefficient Kv value

Nominal diameter 50 65 80 100 125 150 200 250 300 350 400 450
1.6Mpa 24.3 43.7 68.7 110.8 177.7 260.2 453 663.8 983.7 1325.3 1764.5 2266.4
2.5Mpa 24.3 43.7 68.7 110.8 177.7 260.2 453 663.8 983.7 1325.3 1764.5 2266.4
Nominal diameter 500 600 700 800 900 1000 1200 1400 1500      
1.6Mpa 2831 4721.8 5632.5 7439.4 9497 11806 16884 23208 26746      
2.5Mpa                        

Product Dispay

Wafer Triple-offset Sealing Butterfly Valve

Wafer Triple-offset Sealing Butterfly Valve

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