Name of Parts

Material

Advantages/Disadvantages

Valve Body

Bronze

Bronze is generally cast and has better strength, hardness and corrosion resistance than brass

Cast Steel

The price is higher than cast iron and lower than bronze.  It has high mechanical strength and toughness.  With heat resistance, corrosion resistance, wear resistance and other special properties.

Cast Iron

Low production cost, good manufacturability; good casting performance, low melting point; good fluidity; small shrinkage, good cutting performance, and good chip breaking performance. High wear and abrasion resistance, excellent vibration damping and low notch sensitivity

Stainless Steel

Resistant to weak corrosive media such as air, steam, and water, and is rust-resistant

Valve Bonnet

Bronze

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

Cast Steel

The price is higher than cast iron and lower than bronze. Has high mechanical strength and toughness. It has special properties such as heat resistance, corrosion resistance and wear resistance.

Cast Iron

Not resistant to corrosion and cost less than bronze and cast steel

Stainless Steel

It has a series of characteristics such as excellent corrosion resistance, formability, compatibility and toughness

Valve Disc

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

Stainless Steel

Stainless steel has a strong ability to resist tension, wear and corrosion. Stainless steel is much stronger than copper in material. Stainless steel will not produce corrosion, pitting, rust or wear and high temperature resistance.

Valve Stem

Stainless Steel

It has good rust resistance, excellent high temperature resistance and good intergranular corrosion resistance.

Comparison

Product Picture of other low quality supplier

Product Picture of our factory

Other low quality supplier

Consequence

Our Factory

Result

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

the valve is not 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

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

In order to reduce costs, omit raw materials and reduce internal quality, resulting in the thin wall of the valve body that occupies the main body of the valve.

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, uniform thickness, and material

Use with confidence, meet user needs, and the product has a long service life

The manufacturer considers the cost and purchases unqualified standard bolts

Leaving hidden dangers on the valve can easily lead to accidents.

According to customer requirements, use standard bolts.

Use it with confidence, reduce safety hazards and reduce the accident rate.

Use iron, carbon steel to manufacture valves and repair scrap valves as shoddy valve products.

Such products generally have large errors in hardness and accuracy. It is easy to cause the shell to crack, and the phenomenon of running, running, dripping and leaking occurs, and in severe cases, it will cause the explosion of the oil and gas pipelines.

According to customer requirements to manufacture new valves, never shoddy.

Meet the hardness and precision requirements of standard valves,

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

DN

Inter Flange

Outlet Flange

Frame Dimension

d

D

D1

D2

n-φ

b

d1

D3

D4

D6

n1-φ1

b1

h1

L

H

20

20

100

75

58

4-15

14

25

125

90

70

4-19

14

66

88

236

25

25

125

90

70

4-19

14

32

135

100

80

4-19

16

88

95

260

32

32

135

100

80

4-19

16

40

140

105

85

4-19

16

95

100

320

40

40

140

105

85

4-19

16

50

155

120

100

4-19

16

100

120

480

50

50

155

120

100

4-19

16

65

175

140

120

4-19

18

120

160

500

65

65

175

140

120

4-19

18

80

185

150

130

8-19

18

130

140

540

80

80

185

150

130

8-19

18

100

210

175

155

8-19

18

140

160

570

100

100

210

175

155

8-19

18

125

250

210

185

8-23

20

160

180

690

125

125

250

210

185

8-23

20

150

280

240

215

8-23

22

180

200

730

150

150

280

240

215

8-23

22

200

330

290

265

12-23

22

230

255

885

200

200

330

290

265

12-23

22

250

400

355

325

12-23

24

260

300

1055