Pulp and paper O-shaped trunnion type pneumatic actuator ball valve
Coosai O-pattern Ball valvs is a kind of quarter turn on/off valve, mainly are used in shut off system. This series of ball
valves are suitable for those shut off system where medium needs to he tightly shut off , quickly shut off and bidirectionally
shut off . Incorporated with pneumatic or electric actuators, it can be widely used in those industries where high level
process automatic control system is required, such as paper making, chemical, foodmaking,petrochemical industries, etc
Product features:
1. Straight full port,so flow resistance is small,also pressure loss is small.
2. Upper and lower bearing;upper and lower bearings are adapted inside body , so contact with stem will be bigger which will have high carrying capacity and small friction coeffident , that operating torque can be reduced.
3. Seat rings can be metal seats or PTFE soft seat depending on different wording medium.Sealing face of metal
seals will be overlaid with hard alloy.whiie bail surface with hard chromium plated or spraying overtay.plasma
nitridmg.etc.so as to increase working life of sealing races and high temperature resislance =PTFE or RPTFE seats have excellent sealing performance,high corrosion resistance and wide applications.
4. Incorporated with pneumatic or electric actuators,the valves are suitable for those control systems with high
level of automatic control.
5. Wide application:Wiping action will t>e happened between metal seats and ball during shut off operation.lt is
not only suitable for liquid medium.but also better for those Control systems with medium containing fibers and
solid particles.
Product category:
Water trunnion mounted short pattern:DN25-DM80
Flanged trunnion mounted short pattern:DN1QQ-DN3O0
Flanged trunnion mounted standard pattern:DN25-DN4GG
Pressure rating:
Short pattern:PN10, PN16
Standard pattern:PN10, PN16. PN2S , 150Lb
Design standard:
1 . Design standard: GB/T 12237-2007
2 . Flange standard: GB/T9113.1-2010 , JB/T 79.1- 1994, HG 20592-2009 ASME B 16.5 EN 1092-1 : 2001
3 . p-t rating - GB/T 12224-2007 ASME B16,34-2003 ISO 7005-1
4 . Face to face standard:
Short pattern fixed typeiEnterprise standard
Flanged trunnion type standard: GB/T 12221-2005. ISO 5752/BN 558- 12
5 .-29-150 Celsius Normal temperature
-29-250 Celsius Middle temperature
-29-350 Celsius High temperature
6. Shell and Seal pressure test Standard:
Shell and seal pressure test standard: JB/T 9092- 1999
Shell test pressure shall be 1.5 times the pressure rating determined for material at 38 celsius listed in ASTM B16 34. Seat test pressure shall he 1.1 times the pressure rating determined for material at 38 celsius listed in ASTM B16.34 medium is tested by water with scale and corrosion. Air seat test pressure will be done at 0.6 MPa of compressed air.Test fluid shall be fresh water containing a corrosion inhibitor.
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