Design EN 13709
Face to face EN 558-1
End Flanges EN 1092-1
Butt Welding ends EN 12627
Inspection and test EN 12266-1
Size Range: DN15~DN400
Pressure Rating: PN16, PN25, PN40
Temperature Range: -10°C~400°C
1, Double seal design (bellows + fill) if the bellows failure, stem packing will prevent leaks, and sealing line with international standards
2, There is no fluid loss, reduce energy losses and improve the safety of plant equipment
3, Long service life, reduced maintenance times, reducing operating costs
4, Rugged bellows seal design to ensure zero leakage valve stem to provide the conditions for maintenance
5, The gas medium seat of PTFE soft sealing material to improve the tightness of the valve
6, temperature ≤ 400°C using cone seal seat. To achieve zero leakage sealing performance.
|Valve Material||Didtek provide cast steel, stainless steel, special alloy, CI, DI etc|
|Valve Type||Didtek Produce Globe Valve|
|Valve Test||100% quantity tested before delivery|
|Valve Guarantee||18 months after shipments and 12 months after installed|
|Valve Structure||Bellow Globe Valve|
|Valve Delivery||15 - 30 days|
|Valve Sample||Sample Available by Didtek Valve|
|Valve Color||Customer request|
|Valve Packing||Plywood Case for Globe Valve|
|Place of Origin||Zhejiang, China (Mainland)|
|Delivery Detail:||Shipped in 15-30 days after payment|
|Port||Shanghai Or Ningbo|
|Payment Terms||L/C,D/A,D/P,T/T, Western Union|
Application & Function:
Didtek DIN Bellows Globe Valves feature a formed multi-ply bellows welded to the stem and to the bottom of the bonnet, creating a hermetic seal or impermeable barrier. Bellows are available in many materials for virtually all corrosive chemical applications.
Heat Transfer media: hot oil is commonly used in industries such as synthetic fibres / POY (Partially Oriented Yarn). However, there is always a risk of fire due to hot oil spillage on highly inflammable chemicals. Here, bellow seal Valves can stop the leakage.
Vacuum / Ultra high vacuum: some applications require a vacuum pump to continually extract air from a pipeline. Any conventional Valves installed on the pipeline can allow external air to enter the pipeline thorough the Valve stuffing box. Hence the bellow seal Valve is the only solution to prevent air from passing through the stuffing box.
Highly hazardous fluids: for media such as chlorine, hydrogen, ammonia and phosgene, the bellow seal Valve is an ideal design as leakage through the gland is totally eliminated.
Nuclear plant, heavy water plant: in instances where radiation leakage is to be prevented at all times, the bellow seal Valve is the ultimate choice.
Costly fluids: in some applications leaks need to be avoided simply because of the high cost of the fluid. Here, an economic assessment often favours the use of bellow seal Valves.
Environmental standards: around the world, standards regarding emissions and the environment are getting more stringent day by day. It can therefore be difficult for companies to expand within existing premises. With the use of bellow seal Valves, expansion without additional environmental damage is possible.
Gear operators, actuators, locking devices, chain wheels and many others are available to meet the customer’s requirements.