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DN20 PN25 Stainless Steel Globe Valve Flange Type A351 CF8

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DN20 PN25 Stainless Steel Globe Valve Flange Type A351 CF8
Latest company news about DN20 PN25 Stainless Steel Globe Valve Flange Type A351 CF8

DN20 PN25 Flange End A351 CF8 Stainless Steel Globe Valve

 

Globe valves

 

A Globe valves is a linear motion valve and are primarily designed to stop, start and regulate flow.

The disk of a Globe valve can be totally removed from the flowpath or it can completely close the flowpath.

 

Conventional Globe valves may be used for isolation and throttling services. Although these valves exhibit slightly

higher pressure drops than straight=through valves (e.g., gate, plug, ball, etc.), they may be used where the pressure

drop through the valve is not a controlling factor.

 

Because the entire system pressure exerted on the disc is transferred to the valve stem, the practical size limit for these

valves is NPS 12 (DN 300). Globe valves larger than NPS 12 (DN 300) are an exception rather than the rule. Larger

valves would require that enormous forces be exerted on the stem to open or close the valve under pressure. Globe

valves in sizes up to NPS 48 (DN 1200) have been manufactured and used.

 

Quick Details

 

SPECIFICATIONS FOR STEEL GLOBE VALVES
Pressure rating and size: PN10,PN25,PN40,PN64,150L-600LB
DN40 to DN600
1-1/2"~24"
Material: Body : A216-WCB,A325-LCB,A217-WC6,CF8,CF8M
Disc : A105+13Cr, SS304, SS316
Stem : A182+F6a,A182-F6a
Bonnet :A216-WCB,A325-LCB,A217-WC6,CF8,CF8M
Operated type Handwheel
Structure: stopcock for water
Flange connection: ASME B16.5, EN1092
Butt-weld ends: ASME B16.25
Medium: W.O.G
Temperature: -20 to 425°C

 

SIZE d L H W D C G T N-ΦM
1" 25 127 212 140 108 79.5 51 11.1 4-16
1 1/4" 32 140 243 160 117 89.5 64 12.7 4-16
1 1/2" 40 165 246 160 127 98.5 73 14.3 4-16
2" 50 203 252 200 152 120.5 92 15.9 4-19
2 1/2" 65 216 308 200 178 139.5 105 17.5 4-19
3" 80 241 327 250 190 152.5 127 19.1 4-19
4" 100 292 384 250 229 190.5 157 23.9 8-19
5" 125 356 484 300 254 216 186 23.9 8-22
6" 150 406 547 350 279 241.5 216 25.4 8-22
8" 200 495 669 350 343 298.5 270 28.6 8-22
10" 250 622 824 200 406 362.5 324 30.2 12-25

 

Globe valves are extensively employed to control flow. The range of flow control, pressure drop, and duty must be

considered in the design of the valve to avert premature failure and to assure satisfactory service. Valves subjected

to high-differential pressure-throttling service require specially designed valve trim.

 

Generally the maximum differential pressure across the valve disc should not exceed 20 percent of the maximum

upstream pressure or 200 psi (1380 kPa), whichever is less. Valves with special trim may be designed for applications

exceeding these differential pressure limits.

 

ADVANTAGES:

  1. Good shutoff capability
  2. Moderate to good throttling capability
  3. Shorter stroke (compared to a gate valve)
  4. Available in tee, wye, and angle patterns, each offering unique capabilities
  5. Easy to machine or resurface the seats
  6. With disc not attached to the stem, valve can be used as a stop-check valve

 

Typical Applications of Globe valves

The following are some of the typical applications of Globe valves:

  1. Cooling water systems where flow needs to be regulated
  2. Fuel oil system where flow is regulated and leaktightness is of importance
  3. High-point vents and low-point drains when leaktightness and safety are major considerations
  4. Feedwater, chemical feed, condenser air extraction, and extraction drain systems
  5. Boiler vents and drains, main steam vents and drains, and heater drains
  6. Turbine seals and drains
  7. Turbine lube oil system and others

 

Packing Details:

 

We choose suitable wood cases according to different valves and arrange skilled workers to pack in case of bruise.

Long term cooperated forwarder will book space, clear customs and transport for us without delay. There are three

ways for transportation, by sea, by air and by train. We will arrange transportation according to customers' needs.

 

DN20 PN25 Stainless Steel Globe Valve Flange Type A351 CF8 0

 

 

 
Pub Time : 2022-01-04 16:07:51 >> News list
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