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Slow closing check valve

Slow closing check valve

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Describe
First, GL300X slow-closing check valve overview
 
The GL300X slow-closing check valve is a smart valve that is installed at the water pump outlet of high-rise building water supply systems and other water supply systems to prevent backflow, water hammer and water hammer. The valve has three functions of electric valve, check valve and water hammer eliminator, which can effectively improve the safety and reliability of the water supply system, and integrate the technical principles of slow opening, quick closing and slow closing to eliminate water hammer. The pump water hammer and the pump water hammer are generated. Simply operate the pump motor opening and closing button, the valve can automatically open and close according to the pump operating rules, the flow is large, the pressure loss is small.
 
Second, GL300X slow-closing check valve structure features and uses
 
The GL300X slow-closing check valve consists of a main valve, check valve, needle valve, ball valve, micro-filter and pressure gauge to form a hydraulic control take-over system. With automatic hydraulic operation, the main valve can be optimally opened or closed. Prevent the occurrence of water hammer and water hammer to achieve the effect of slow closing and noise reduction. This product utilizes hydraulic self-power control, does not require other devices and energy, is easy to maintain, and is stable and stable. This series of valve products are widely used in high-rise buildings, living areas and other water supply pipe network systems and urban water supply projects.
 
Third, the working principle of GL300X slow-closing check valve
 
When the valve feeds water from the inlet end, the water enters the main valve control chamber through the microfilter, needle valve, and check valve, and then drains to the downstream through the ball valve. Since the needle valve opening degree is smaller than the ball valve opening degree, that is, the drainage speed of the main valve control chamber is greater than the water inlet speed, the control chamber pressure is lowered, and the inlet pressure acting on the lower end of the main valve disc opens the main valve to supply water downstream. When the pipeline stops supplying water, if the downstream water starts to flow back, a part of the return water enters the main control room through the ball valve. Due to the check valve function, the return water cannot flow out from the main control room, causing the main control room to gradually increase pressure and slowly close the main valve. .
 
Fourth, GL300X slow closing check valve main technical parameters
 

Nominal pressure(Mpa)

Shell test pressure(MPa)

Seal test pressure(MPa)

Applicable medium

Medium temperature(℃)

1.0

1.5

1.1

water

0-80

1.6

2.4

1.76

2.5

3.75

2.75

 

Five, GL300X slow-closing check valve main parts and materials

 

Part Name

Part material

Valve body bonnet

WCB

Seat valve disc

Copper alloy

Seal ring O-ring

Nitrile rubber

Valve stem

2Cr13

spring

50CrVA

Needle valve

Copper alloy

Ball valve

Copper alloy

Float valve

Copper alloy

Micro filter

stainless steel

 

 

Seven, GL300X slow-closing check valve Main size

 

Nominal diameterDN(mm)

size(mm)

L

A1

A

H1

H

F

20

150

200

282

106

172

116

25

160

200

282

106

172

116

32

180

200

282

106

172

116

40

200

210

320

137

225

168

50

203

210

320

137

225

168

65

216

215

330

145

270

180

80

241

220

330

178

289

210

100

292

230

410

232

375

284

125

330

245

420

286

420

310

150

356

260

420

318

450

370

200

495

280

430

413

722

463

250

622

300

450

502

769

525

300

698

320

460

600

906

625

350

787

340

470

637

1480

705

400

914

360

480

677

1027

778

450

978

360

480

677

1027

778

500

978

410

780

750

1110

690