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Dungong Valve (Shanghai) Co., Ltd.

Mobile phone: 13918861646

Telephone: 021-33656988

Mailbox: dungongvalve@163.com

Website: www.sh-dgvalve.com

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Address: No. 5118, Nanfeng Road, Fengxian District, Shanghai

Z45H Dark Stem Gate Valve

Z45H Dark Stem Gate Valve

  • category:Gate
  • Views:Times
  • Release date:2020-12-14 14:50:06
  • product description
  • Performance characteristics
  • technical parameter

Z45H Dark Stem Gate Valve

Professional gate valve manufacturers dark stem gate valve is also called rotating stem gate valve (also called dark stem wedge gate valve). The valve stem nut is set on the gate. The rotation of the handwheel drives the rotation of the valve stem to lift the gate. There is usually a trapezoidal thread at the bottom end of the valve stem. The thread on the bottom end of the valve and the guide groove on the disc will rotate It becomes linear motion, that is, the operating torque is changed to operating thrust. When the valve is opened, when the lifting height of the gate is equal to 1:1 times the valve diameter, the fluid passage is completely unblocked, but this position cannot be monitored during operation.

The opening and closing part of the concealed stem gate valve is the gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces. The two sealing surfaces of the most commonly used model gate valve form a wedge. The wedge angle varies with valve parameters, usually 50. The gate of the wedge gate valve can be made into a whole, called a rigid gate; it can also be made into a gate that can produce slight deformation to improve its manufacturability and compensate for the deviation of the sealing surface angle during the processing. The plate is called an elastic gate.

Main material of stainless steel dark stem gate valve accessories:

The main material of the valve body: ductile iron, cast steel, stainless steel, mainly 316L, and indicate the brand and actual physical and chemical test data of the cast iron.

Stem material: Strive for stainless steel stem (2CR13), large diameter valves should also be stainless steel embedded stems.

Nut material: use cast aluminum brass or cast aluminum bronze, and the hardness and strength are greater than the valve stem.

Stem bushing material: its hardness and strength should not be greater than that of the valve stem, and it will not form electrochemical corrosion with the valve stem and valve body under water immersion.

technical parameter

1. Brief introduction of Z45H dark rod cast steel gate valve:

  The Z45H concealed rod cast steel gate valve is a product produced by Shield Engineering. It replaces the traditional cast iron valve. It has compact structure, reasonable design, good rigidity, smooth passage and small flow resistance coefficient. The sealing surface is made of stainless steel and hard alloy. Long service life; dark rod cast steel gate valve adopts flexible graphite packing, reliable sealing, light and flexible operation. The driving mode is divided into manual, electric, pneumatic and gear transmission; structure type: elastic wedge single gate, rigid wedge single gate and double gate type. Concealed rod cast steel gate valves are widely used in petrochemical, metallurgy, water treatment, thermal power plants and other oil and steam pipelines as opening and closing devices for connecting or cutting off the medium in the pipeline.

2. Material of Z45H Dark Rod Cast Steel Gate Valve Parts:

model

Valve body, valve cover, gate

Sealing ring

Valve stem

Filling

Z45H-10

Gray cast iron, cast steel


stainless steel

Carbon steel, stainless steel


 Oil-impregnated asbestos packing

Z45W-10

Z45T-10

Z45T-16

Z45W-16

Z45H-16C

Z45T-16C

Z45W-16C

3. Dimensions of Z45H Dark Rod Cast Steel Gate Valve:

Caliber   DN(mm)

Z45T-10

Z45-16(C)

L

D

H

D0

L

D

H

D0

40

165

145

300

160

240

345

200

160

50

180

160

300

180

250

355

240

180

65

195

180

340

180

265

375

240

180

80

210

195

360

200

280

435

280

200

100

230

215

400

200

300

500

320

200

125

255

245

500

240

325

615

360

240

150

280

280

550

240

350

675

360

240

200

330

335

620

320

400

750

400

320

250

380

390

700

320

450

970

450

320

300

420

440

800

400

500

1145

560 

400

350

450

500

950

400

550

-

-

400

400

480

565

1050

500

600

-

-

500

450

510

615

1175

500

650

-

500

500

540

670

1410

720

700

-

-

720

600

600

780

1550

720

750

-

-

720

700

660

895

1800

800

-

-

-

800

800

720

1010

2170

-

-

-

-

-

900

780

1110

2300

-

-

-

-

-

1000

840

1220

2600

-

-

-

-

-

1200

960

1450

-

-

-

-

-

-

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4. Features and uses of Z45H dark rod cast steel gate valve:

(1) Compact structure. The design is reasonable, the valve rigidity is good, the passage is smooth, and the flow resistance coefficient is small.

(2) The sealing surface is made of stainless steel and hard alloy, with long service life.

(3) Use flexible graphite packing. Reliable sealing. The operation is light and flexible.

(4) Drive form: manual, electric, gear drive.

(5) Structural form: elastic wedge single gate, rigid wedge single gate and double gate type.

(6)  Widely used in petrochemicals, thermal power plants and other oil products, as an opening and closing device for connecting or cutting off the medium in the steam pipeline

5. Installation instructions of Z45H dark rod cast steel gate valve:

(1) The handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.

(2) The double gate valve should be installed vertically, that is, the valve stem is in the vertical position and the handwheel is on the top.

(3) Before opening a gate valve with a bypass valve, the bypass valve should be opened to balance the pressure difference between the inlet and outlet and reduce the opening force.

(4) The gate valve with transmission mechanism shall be installed according to the regulations of the product manual.

(5) If the valve is frequently opened and closed, lubricate at least once a month.


 


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Cell phone:13918861646

phone:021-33656988

URL:www.sh-dgvalve.com 

address:No. 5118, Nanfeng Road, Fengxian District, Shanghai

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