Bellow Sealed 800Lb Globe Valve DN80 WCB PN16 Flange End Globe
Valve The Cooling Water System
Standard Material Specifications Bellow Sealed 800Lb Globe Valve NO. | Part Name | CS to ASTM | AS to ASTM | SS to ASTm | Type A105 | Type A182 F22 | Type A182 F304 | Type A182 F316(L) | 1 | Body | A105 | A182 F22 | A182 F304(L) | A182 F316(L) | 2 | Disc | A276 420 | A276 304 | A276 304(L) | A276 316(L) | 3 | Gasket | Corrugated SS + graphite | SS + PTFE | 4 | Bonnet Bolt | A193 B7 | A193 B16 | A193 B8 | A193 B8M | 5 | Stem | A182 F6 | A182 F304 | A182 F304(L) | A182 F316(L) | 6 | Bellow Pipe | SS | 7 | Bonnet | A105 | A182 F22 | A182 F604(L) | A182 F316(L) | 8 | Stem Packing | Flexible Graphite | PTFE | 9 | Pin | A276 420 | A182 F304 | 10 | Gland | A276 420 | A182 F304 | 11 | Gland Eyebolt | A193 B7 | A193 B16 | A193 B8 | A193 B8M | 12 | Gland Flange | A216 WCB | A351 CF8 | 13 | Gland Nut | A194 2H | A194 4 | A194 8 | A194 8M | 14 | Bearing Washer | SS | 15 | Yoke Nut | A276 410 | 16 | Nameplate | SS | 17 | Handwheel | A197 | 18 | H.W.Nut | A194 2H | A194 4 | A194 8 | A194 8M | Suitable Medium | W.O.G.etc | W.O.G.etc | HNO3,CH3OOH etc | Suitable Temperature | -29℃~425ℿ/DIV> | -29℃~550ℿ/DIV> | -29℃~180ℿ/DIV> |
Dimensions (mm) and Weights (Kg)NPS | Conv. | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | 2 | Full | | 3/8 | 1/2 | 3/4 | 1 | 1-1/4 | 1-1/2 | L | 79 | 79 | 92 | 111 | 120 | 152 | 172 | H(OPEN) | 220 | 220 | 225 | 244 | 321 | 321 | 347 | W | 100 | 100 | 100 | 125 | 160 | 160 | 180 | Weights | Bolted | 3.2 | 3.0 | 4.8 | 7.9 | 11.0 | 16.8 | 25.2 | Welded | 3.0 | 2.8 | 4.8 | 7.0 | 9.6 | 13.5 | 20.2 |
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Globe valve contains many different parts like bonnet, body, stem,
seat, plug, etc. Let’s discuss all of them.
The body is the primary pressure boundary of the valve. It keeps
all the internal parts together inside it. It is connected with a
bonnet.
The bonnet is connected with the body through bolts or screwed. It
is a secondary pressure boundary. The stem moves vertically inside
the bonnet and opens and closes the valve. It contains packing to
eliminate leaking.
The plug is the element that throttles the flow of fluid. It is
connected with the stem and opens and closes by stem movement. In
the close condition, it fits on the seat and stops the flow of
fluid.
The stem is the connector between the actuator and plug. By
rotating the actuator we can open and close the valve by plug
movement.
The seat is the part of the valve where the plug fits and stops the
flow of fluid.
| 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 |
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.
| 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 and disadvantages of Globe valves
ADVANTAGES:
- Good shutoff capability
- Moderate to good throttling capability
- Shorter stroke (compared to a gate valve)
- Available in tee, wye, and angle patterns, each offering unique
capabilities
- Easy to machine or resurface the seats
- With disc not attached to the stem, valve can be used as a
stop-check valve
DISADVANTAGES:
- Higher pressure drop (compared to a gate valve)
- Requires greater force or a larger actuator to seat the valve (with
pressure under the seat)
- Throttling flow under the seat and shutoff flow over the seat
Typical Applications of Globe valves
The following are some of the typical applications of Globe valves:
- Cooling water systems where flow needs to be regulated
- Fuel oil system where flow is regulated and leaktightness is of
importance
- High-point vents and low-point drains when leaktightness and safety
are major considerations
- Feedwater, chemical feed, condenser air extraction, and extraction
drain systems
- Boiler vents and drains, main steam vents and drains, and heater
drains
- Turbine seals and drains
- 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.
Delivery Details: According to the order, 7~60days
