Welded Balance Valve

1 The valve body structure is integrally welded, and there will be no external leakage.

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2 Stem sealing with double o-rings.

3 The valve body material is the same as the pipe material, and there will be no stress unevenness in welding.

4 Light weight and space saving design that easy to install and use.

5 The best W-shaped adjustment ball port design can meet the equal percentage flow adjustment curve.

6 There are adjustable full-open and 100% full-open limits on the valve stem to prevent operation beyond the control range.

7 With balancing and closing function at the same time.

8 The universal adjustment wrench can operate and adjust the valve in a narrow space.

9 Has the same lifespan as long as the pipeline.

10 The universal adjustment wrench can operate and adjust the valve in a narrow space.

DN200 WCB Flange End Z-Body Type Globe Valve High Temperature

Though the construction and design of globe valve is usually made according to the requirements,

there are three main designs of the globe valve

• Z-body type valve

• Y-body type valve

• Angle valve

Z-body type valve

This is the simplest and most commonly used design of globe valves, favorable for applications involving water flow. The name Z-shaped is derived from the Z shaped diaphragm or partition in the bulbous shaped body. The stem and the disc move at right angle to the valve body, aligning with the horizontally arranged seat. The stem passes through the bonnet attached to a wide opening at the top.

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,EN 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.

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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 ) 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 ( 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.

For more information, please visit Welded Ball Valve Dn200-Dn300.