Design standard of forged steel bellows globe valve:
Manufacturing standard: GB12235
Structure standard: GB12221
Flange standard: HG/T 20595-97 GB7306-81 (RC); JB/T1751-95
Butt welding standard: GB12224
Experimental standard: GB13927
Manufacture:GB12235
Face To Face:GB12221
Flange:HG/T 20595-97 GB7306-81 (RC); JB/T1751-95
Butt-welding:GB12224
Test:GB13927
Forged steel bellows globe valve product advantages:
1, no leakage loss – energy saving and protect the environment.
2, the operation is simple — no lifting hand wheel and position indication (“+” “-“), so that the operation is more intuitive; At the same time, the valve cap is equipped with a locking nut to fix the valve opening in a certain position.
3, the bellows stop valve long service life – all zero leakage of the double-layer bellows seal structure design, will not produce any failure during operation, bellows fatigue life is long, if the bellows unfortunately fail, the valve cover packing seal can provide a secondary seal to prevent leakage.
4, no maintenance – the bellows seal structure not only has a leakage phenomenon, but also needs no maintenance, if the internal parts need to be replaced, it is also very simple and fast, and all the gaskets do not contain asbestos components.
5, in line with the European pressure equipment Directive.
6, the bellows globe valve is durable – this product is not affected by vibration, can work in a wide range of pressure and temperature. Zero leakage stop valves with throttle spool can be manually performed for rough and simple control of the pressure and flow in the system, and can also replace the bypass valve for rough and simple control.
7, all stainless steel model is generally used for corrosion environment, the valve cap comes with grease joint, can lubricate the valve stem and shaft sleeve.
8, all models of zero leakage stop valve in the corresponding handwheel rotation of the Kv value test standards meet.
Forged steel bellows globe valve product features:
· Double layer bellows
· Easy maintenance
· Bellows seal valve stem
· Double seal
· Position indication
· No lifting hand wheel
Forged steel bellows globe valve product use:
· Waste gas purification plant · Vacuum device · Hot water · heating equipment
· Power station · Natural gas · Ammonia · Refrigeration system · Steam system
Forged steel bellows globe valve main zero material table:
NO. PARTSNAME MATERIAL
1 Valve body A105N, F304, F316
2 Seat 304, Stelllte
3 Valve disc 20Cr13, F304, F316
4 pin S.S.304, S.S.316
5 Bellows assembly S.304, S.316L
6 Valve stem 20Cr13, F304, F316
7 gaskets flexible graphite + stainless steel
8 Valve cover A105N, F304, and F316
9 Hexagon nut ASTMA194-2HA194-8
10 Stud ASTMA193-B7, A193-B8
11 Packing flexible graphite
12 Pressure plates A105, F304, F316
13 Bolt ASTMA193-B7, A193-B8
14 Hexagon nuts STMA194-2H, A194-8
15 positioning piece 45#
16 Valve female copper alloy, D2, BL2
17 Hand wheel KTH300-06
18 and cap 45#
Steel bellows stop valve main connection size:
caliber
DN The connection size is PN16 to PN40
L D D1 D2 B F H n-Φd
15 130 95 65 45 16 2 210 4-Φ14
20 150 105 75 58 18 2 215 4-Φ14
25 160 115 82 68 18 2 220 4-Φ14
32 180 140 100 78 18 2 225 4-Φ18
40 200 150 110 88 18 3 250 4-Φ18
50 230 165 125 102 20 3 270 4-Φ18
Forged steel bellows globe valve application scope:
The forged steel bellows globe valve is designed for double sealing, so the sealing performance has more reliable advantages. As the main component of technology, the bellows greatly improve the fatigue resistance and service life of the bellows globe valve, so that the bellows globe valve in high temperature, low temperature, harmful gas, strong corrosion, energy saving and other fields.
