Name of Parts

Material

Advantages/Disadvantages

Valve Body

Bronze

Pressure resistance, wear resistance, and toughness are higher than those of brass. Bronze has a certain delay in the rusting time of the valve. more expensive than brass

Brass

Brass has strong wear resistance. It has high strength, high hardness and strong chemical resistance. The mechanical properties of cutting are also outstanding

Valve Bonnet

Bronze

Seawater corrosion resistance, a little more expensive than cast steel and cast iron

Brass

Brass has low pressure resistance and is easy to rust. The price is lower than bronze.

Valve Sphere

Bronze

Bronze has excellent low temperature resistance, the price is a little more expensive than stainless steel, and the seawater resistance of bronze is better than that of stainless steel

Brass

Brass has good mechanical properties and wear resistance

Valve Stem

Bronze

Bronze has excellent low temperature resistance, good corrosion resistance, wear resistance, casting and excellent mechanical properties

Brass

The price is cheap, the strength and hardness are high and the plasticity is poor, but it can still withstand pressure processing well in the hot state, and the corrosion resistance is average.

Valve Seat

PTFE

It has the characteristics of acid and alkali resistance and resistance to various organic solvents, and is almost insoluble in all solvents. At the same time, PTFE has the characteristics of high temperature resistance, and its friction coefficient is extremely low

Comparison

Product Picture of other low quality supplier

Product Picture of our factory

Other low quality supplier

Consequence

Our Factory

Result

In order to omit raw materials and reduce costs, it is expensive, resulting in thinning of the valve body

Leaving a safety hazard, the thin wall is easy to break or leak the valve at high temperature and high pressure or during operation.

Strictly in accordance with the standard processing

To meet the needs of users, long service life of products

Poor manufacturing quality of valve cover, uneven thickness, uneven material

Bonnets are prone to breakage, blisters, corrosion or aging problems

Strictly in accordance with the standard processing, uniform thickness, uniform material

The quality of the valve cover is good, it is not easy to generate air holes, and the product has a long service life.

Refurbished valve old valve masquerading as new valve

Refurbished valves are easy to cause the shell to crack, and the phenomenon of running, running, dripping and leaking occurs, and in severe cases, the oil and gas pipelines will explode.

Manufacture new valves in strict accordance with customer material requirements

Meet the hardness and precision requirements of standard valves,

The quality of flange manufacturing is poor, and there are problems such as cracks, pores, and insufficient thickness

As a result, the valve is wear-resistant, the pressure bearing is poor, the valve is prone to quality problems, and the service life is short.

Select materials in strict accordance with national standards

Ensure the quality of the valve and ensure the normal operation of the equipment.

Replace the copper stem with an iron-copper-plated stem

The performance of the substitute material is unstable, resulting in a decrease in the quality of the valve.

Strictly select materials according to user requirements

The valve is wear-resistant, has good pressure-bearing performance, and is not easy to be damaged.

The valve stem hardness is too low, there are cracks, the valve stem is not round, and the valve stem is not bent and straight.

The stem sealing surface is easily damaged and the valve service life is short.

Materials are selected according to standards and customer requirements.

High safety factor, reasonable structure, long product life

Pressure

DN

Structure Dimension

Flange Dimensions

L

W

H

D

C

t

n

h

10K

15

108

100

62

95

70

12

4

15

20

117

120

68

100

75

14

4

15

25

127

160

75

125

90

14

4

19

32

140

180

85

135

100

16

4

19

40

165

200

95

140

105

16

4

19

50

178

250

110

155

120

16

4

19

65

190

300

130

175

140

18

4

19

80

203

400

155

185

150

18

8

19

100

229

500

180

210

175

18

8

19

125

356

600

250

250

210

20

8

23

150

394

800

275

280

240

22

8

23

200

457

1000

345

305

290

22

12

23

Pressure

DN

Structure Dimension

Flange Dimensions

L

W

H

D

C

t

n

h

20K

15

150

100

62

95

70

14

4

15

20

152

120

68

100

75

16

4

15

25

165

160

75

125

90

16

4

19

32

178

180

85

135

100

18

4

19

40

190

200

95

140

105

18

4

19

50

216

250

110

155

120

18

8

19

65

241

300

130

175

140

20

8

19

80

283

400

155

200

160

22

8

23

100

305

500

180

225

185

24

8

23

125

381

600

250

270

225

26

8

25

150

403

800

275

305

360

28

12

25

200

502

1000

345

350

305

30

12

25

Pressure

DN

Structure Dimension

Flange Dimensions

L

W

H

D

C

C1

C2

f

t

n

h

40K

15

165

180

70

115

80

31

43

5

19

4

19

20

190

200

75

120

85

37

51

19

4

19

25

216

200

85

130

95

44

61

21

4

19

32

229

250

100

140

105

54

71

22

4

19

40

241

300

115

160

120

59

76

22

4

23

50

292

350

130

165

130

69

91

24

8

19

65

330

400

155

200

160

89

111

28

8

23

80

356

450

180

210

170

99

121

30

8

23