Product Center
Product Center

We manufacture more than a thousand specifications of over ten series of products, including safety valves, power station valves, steam extraction check valves, gate valves, globe valves, check valves, hard-sealed ball valves, all-welded ball valves, ball valves, butterfly valves, and other models and specifications.

Scroll Down
+
  • 58(1742273942582).png
  • 58a.png

GA49H-40 / GA49H-40

Surge safety valve / main safety valve

Main safety valves and high-temperature, high-pressure safety valves are mainly used on power plant boilers, pressure vessels, and desuperheating and pressure-reducing devices to prevent pressure from exceeding the maximum allowable pressure and to ensure safe operation of the equipment. When the medium pressure rises to the set pressure, the impulse safety valve opens, and the medium enters the piston chamber of the main safety valve from the pulse pipe, pushing the piston down to automatically open the valve. When the impulse valve is closed, the valve disc automatically closes again.

Product Classification:

Safety valve

Key words:

Online Message
ruifa1988@vip.sina.com

Main Performance Specifications

Model

Nominal Pressure (MPa)

Strength Test Pressure (MPa)

Applicable Medium

Applicable Temperature / ℃

A49H-40

4.0

6.0

Steam

-29~425℃

 

 

Main Component Materials

Nominal Diameter
DN(mm)

Size (mm)

Weight

D

D1

D2

D6

b

Z−φd

L

L1

H1

H2

Outlet Flange

150

300

250

218

204

30

8−25

220

240

230

500

PN25 DN200

138

200

375

320

282

260

38

12−30

270

330

295

620

PN25 DN300

250

250

445

385

345

313

42

12−34

300

370

350

650

PN25 DN350

372

 

 

Main External Connection Dimensions

Model

Valve Body/Valve Cover

Valve Disc

Piston/Stem/Adjusting Screw

Sealing Surface

Spring

A49H-40

WCB

25#

20Cr13

Iron-based Alloy

50CrVA

 

Online Message

If you are interested in our products, please leave your email and we will contact you as soon as possible. Thank you!

Submission

Recommend Products

At present, it can produce more than a dozen series of more than 1,000 specifications of safety valves, power station valves, extraction check valves, gate valves, ball valves, check valves, butterfly valves, drain valves, balance valves, and regulating valves of different types and specifications.

Double spring safety valve

Double spring safety valve

A37H/38Y/43H-16C

This valve is suitable for equipment or pipelines with steam, water, and other media operating at temperatures ≤350℃, serving as a pressure relief device. The connection flange conforms to the JB/T 79 standard.
Spring-loaded safety valve

Spring-loaded safety valve

A42Y-160/320;A42Y-160P/320P

The A42Y-C type is suitable for equipment or pipelines with air, petroleum gas, and other media where the operating temperature is ≤300℃.
The A42Y-P/R type is suitable for equipment or pipelines with corrosive gaseous media where the operating temperature is ≤200℃, serving as a pressure relief device.
Connecting flanges conform to JB/T 79 standard.
Flanged Gate Valve

Flanged Gate Valve

PN2.5-4.0MPa

A straight-through stop valve is a common shut-off valve with characteristics such as a valve seat surface that is not easily worn or scratched; good sealing, long life; good process performance and a wide applicable pressure and temperature range. The closing member moves along the center line of the valve seat, and the change in the valve seat passage is directly proportional to the stroke of the valve disc, with a small valve disc stroke and short opening and closing time. The valve has a small height, making it easy to install and operate in engineering and use. It is generally not used to regulate flow. Main drive methods include: manual, electric, pneumatic, and hydraulic.
Diaphragm balanced safety valve

Diaphragm balanced safety valve

WA42Y-16C/25/40 WA42Y-16P/25P/40P

This valve is suitable for equipment or pipelines with operating temperatures ≤200℃, unstable back pressure, or toxic and corrosive media, or occasions with high back pressure, acting as a pressure relief device.
Connecting flanges are in accordance with JB/T79 standard.