• Pressure seal globe valve
  • Pressure seal globe valve

Pressure seal globe valve

Mterial of pressure seal globe valve:  WCB,LCB,WC6,WC9,CF8,CF8M.CF3.CF3M,CN7M,904L

Size of pressure seal globe valve:   2inch(DN50) - 20 inch (DN500)

Pressure of pressure seal globe valve:  900LB(PN150)-2500LB(PN420)

Connection type:  Flange(RF,RTJ) BW,SW

Kind of drive:  Wrench,Gear,Electric actuators and pneumatic actuators

Operating temperature :   -100℃ - 600℃

Working medium :  water, gas,oil.Sulfuric acid and hydrochloric acid

Catalogue:

Cast steel gate,globe,check valves.pdf


The pressure seal globe valve is one type in globe valve,it usually used for high pressure piping line,they are designed in accordance with BS1873 and ASME B16.34 for service of high temperature and high pressure and are widely used in fossil fuel power plant. Compared with bolted bonnet joint valves, it provides absolute reliable sealing of the bonnet joint, so that the pressure seal valves are more compact and rigid as well as maintenance cost-effective at high temperature and high pressure service.

The two openings for medium flowing in and out are in the same direction, forming an angle of 180°. In addition, at seat and disc seal surface are over-lay with iron-base alloy or Co-base alloy or carbide alloy for long duration. For large size valves will be designed with main disc and vice disc type, and medium flow from up disc to down disc, that the operation torque will be greatly decreased and the seat tightness performance are more reliable.


The features for pressure seal globe valves:

Design standard as per: BS1873,ASME B16.34, GB/T 12235, DIN3356

Generally, lift of disc is just 1/4 of the valve seat port, ensuring a short opening and closing time.

Only one sealing face is designed on the valve body and valve disc,

For large size valves will be designed with main disc and vice disc type, and medium flow from up disc to down disc.

Full stellite overlay seat sealing surface

Good for manufacturing process and easy to maintain.

The valve is designed as a back seat sealing structure.

Use flexible and woven graphite collaboration type packing(V type).

Optional by-pass design,

Top flange size as ISO5211 design easy to install pneumatic actuators and electric actuators。


Dimensional drawing for pressure seal globe valve

Globe valve


Specifications


Pressure seal globe valve:
OS&Y, Rising stem or NRS Stem structure
Pressure seat Bonnet, Threaded or welded seat ring,better seal for better pressure
High pressure self sealing globe valves has following advantages:
self seal structure can make high pressure valve body, the valve cover joint structure compact, save labor and material, safe and reliable.

Product Details
Design and Manufacture
ANSI B16.34,BS1873
Face to face(end to end)
ANSI B16.10
Flanged connection
ANSBI B16.5
Butt welded end
ANSI B16.25
Test and inspection
API598

NO.
Part name
WCB
LCB
WC6
WC9
08
Stud and nut
A193 Gr B7/A194 Gr 2H
A193 Gr B7/A194 Gr 4
A193 Gr B16/A194 Gr 4/7
A193 Gr B16/A194 Gr 4/7
07
Gland packing
Graphite
Graphite
Graphite
Graphite
06
Gasket
Soft lron
Soft lron
Ss304
Ss304
05
Thrust ring
A105
A182 F304
A182 F11
A182 F22
04
Back up ring
A105
A182 F304
A182 F11
A182 F22
03
Yoke
A216 Gr WCB
A352 Gr LCB
A271 Gr WC6
A271 Gr WC9
02
Bonnet
A216 Gr WCB
A352 Gr LCB
A271 Gr WC6
A271 Gr WC9
01
Body
A216 Gr WCB
A352 Gr LCB
A271 Gr WC6
A271 Gr WC9

Dimensions
Class 1500
Size
inch
2
2-1/2
3
4
5
6
8
10
L-L1
mm
368
419
470
546
673
705
832
991
L1-SP
mm
216
254
305
405
483
559
711
864
H
mm
565
580
380
800
825
1130
1450
1535
K
mm
300
350
400
450
450
450
450
500
WT
Kg
80
90
115
160
300
410
650
1150



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