1'' 300# Flange Connection Stainless Steel 316L Forged Globe Valve
What is Globe Valve?
A globe valve is a linear motion valve used to stop, start, and regulate the fluid flow.
The globe valve disk can be removed entirely from the flow path, or it can completely close the flow path.
During the opening and closing of the valve, the disc moves perpendicularly to the seat.
This movement creates the annular space between the disk and seat ring that gradually closes as the valve closed.
This characteristic provides the globe valve good throttling ability required for regulating the flow.
Leakage from the globe valve seat is less as compared to the gate valve, mainly due to right angle contact between
the disc and seat ring, which allows tighter seal between seat the disk.
|SPECIFICATIONS FOR STEEL GLOBE VALVES
|Pressure rating and size:
|DN40 to DN600
||Body : A216-WCB,A325-LCB,A217-WC6,CF8,CF8M
|Disc : A105+13Cr, SS304, SS316
|Stem : A182+F6a,A182-F6a
||stopcock for water
||-20 to 425°C
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.
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
- 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
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
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