Description
Our Services
Pre-sale service:
1.We have full stock and can deliver within short time.
2.OEM and ODM order are accepted, Any kind of logo printing or design are available.
3.Good Quality + Factory Price + Quick Response + Reliable Service, is what we are trying best to offer you.
4.All of our products are produced by our professional workman and we have our high-work-effect foreign trade team, you can totally believe our service.
After you choose:
1. We will count cheapest shipping cost and make invoice to you at once.
2. Check quality again, then send out to you at 1-2 working day after your payment
3. Email you the tracking no., and help to chase the parcels until it arrive you.
After-sale service:
1.We are very glad that customers give us some suggestion for price and products.
2.If you have any question,please contact us freely by E-mail or Telephone.
What is a bellows sealed valve?
A Bellow Sealed Valve is a industrial process valve designed to eliminate valve leakage and are also known as ‘Zero Leak Valve‘ or ‘Emission Free Valve. … A bellow is a long accordion-like tube. As the valve stem strokes, the bellow expands or compresses with the stroke movement..
Why bellow seal valves are used?
The use of a bellows seal valve significantly reduces external leakage. By covering the circumference of the valve stem with bellows, leakage from the gland components is reduced.
How Do Bellows Seal Valves Work?
These valves feature an accordion like bellows—i.e., the bellows cartridge component, welded to the valve stem and bonnet. During the valve stroke the bellows compress or expand along with the sliding stem’s linear motion with little to no friction.
| DN 15 – DN 50 | |||
| 150# / 300# | |||
| C.S | S.S | Low temp. | |
| T min. | -29°C | -29°C | -29°C |
| T max. | +425°C | +538°C | +425°C |
| Materials | A105 & LF2 | F316/F304 | |||
| 150# | 300# | 150# | 300# | ||
| HYDRO | SHELL | 30 | 77 | 29 | 75 |
| SEAT | 22 | 57 | 21 | 55 | |
| AIR | SEAT | 7 | 7 | 7 | 7 |
Testing Pressure in bar (API 598) :
| DN | L | H closed | ØD | ØC | Cv | Weight (approx.) |
| [mm] | [mm] | [mm] | [mm] | [kgs] | ||
| 15 | 86 | 200 | 100 | 9 | 2.5 | 2.5 |
| 20 | 92 | 210 | 100 | 12 | 3.5 | 2.5 |
| 25 | 106 | 220 | 100 | 17 | 6 | 4 |
| 32 | 130 | 290 | 150 | 23 | 12 | 7.5 |
| 40 | 130 | 300 | 150 | 25 | 12 | 8 |
| 50 | 145 | 315 | 150 | 30 | 28 | 13.5 |
