Big Size Cast Steel Body Trunnion Mounted Ball Valve Size 30 Inch
Class 300
Product Description
The Trunnion Mounted ball valve adopts the advanced spring
preloaded floating valve seat assembly,suitable for
Class150~Class2500 PN16~PN160 pipelines, used to cut off or connect
the medium in the pipeline.
The Trunnion Mounted ball valve can be applied to water, steam, oil, nitric acid,
acetic acid, oxidizing medium,
urea and other media.
Trunnion Mounted Ball Valve Content
| Design standard | API6D |
| Pressure-temperature Rating | ASME B16.34 |
| Face to Face Dimensions | ASME B16.10 |
| Flange Type and Dimensions | ASME B16.5 |
| Inspection and Test | API 6D, API598 |
Design Feature
Upstream Seal Two-way Valve
Have two seats on both sides. Each seat has springs loaded and make seat insert contact the ball surface for sealing.
Therefore this type of valve is bi-directional sealing and Installation direction is not restricted.
Fire-Safe Design API 607/API 6FA
In case of accidental fire or abnormal heating that softens and
burns the non-metallic valve seat, it is specially tested.
The broad-seat supported metal sealing surface can prevent internal
leakage under the action of spring load.Meanwhile,
in the middle flange, the upper and lower parts of the adjusting
stem will form metal surface contact, which can also
prevent upper and external leakage.Complies with the requirements
of API6FA or API607.
Stem and Seat Emergency Sealant Injection
The seat ring and the valve stem have a special grease injection
valve. In case of the leakage,
the grease will be injected to the valve ball surface and stem room
to create a temporary sealing.
Double Block and Bleed
The trapped cavity pressure can bleed out by vent fitting or drain
plug when the valve is in
fully open or fully closed position. The fluid is intercepted by
seats of up and down stream
side. So the stem packing or O-ring may be replaced under working
pressure. Each seat works
independently assuring tight seal against ball on both upstream and
downstream side.
Trunnion Mounted Ball Valve Test Procedure
| HYDROSTATIC SEAL TEST API 6D 10.3 and 10.4 |
| Sequence | Area Pressure | Duration(min) | Description |
| SHELL TEST | | A | 1.5xPN | 6″-10″ | 5 | 1. Valve in partial open.
2. Set the pressure to 150% PN.
3. Reduce the pressure to 50% PN.
4. Reset the pressure to 150% PN.
5. Hold the pressure for the duration of testing.
|
| B | 1.5xPN | 12″-18″ | 15 |
| C | 1.5xPN | 20″-60″ | 30 |
| SEAT TEST | | A | 1.1xPN | 5 | Seat hydrostatic seal at A end towards body B |
| B | Atmospheric |
| C | Atmospheric |
| | A | Atmospheric | 5 | Seat hydro seal at C end towards body B |
| B | Atmospheric |
| C | 1.1xPN |
| | A | 1.1xPN | 5 | Seat hydro seal test for both A and C |
| B | Atmospheric |
| C | 1.1xPN |
| AIR SEAL TEST API 6D 10.4 |
| SEAT TEST | | A | Atmospheric | 5 | Seat air seal test at A end towards body B |
| B | Atmospheric |
| C | 80PSLG(5.5bar) |
| | A | 80PSLG(5.5bar) | 5 | Seat air seal test at C end towards body B |
| B | 80PSLG(5.5bar) |
| C | Atmospheric |
Company Profile
Zigong Weite Valve Mfg Co., Ltd. was established in 2007,we have a
plant area of 15,400 m² and is equipped
with a technology research and development center.Our R&D team
consists of experienced superior valve
experts and engineers that can according to customers’ requirement
for OEM and ODM.
Most important that we strictly enforces the quality control of
ISO9001 , API6D, ASME, B16.34, API608, BS5351,
ISO17292, DIN etc.Our Valves can widely use in the industry of
Petroleum, Natural gas,Chemical, Light, Ore pulp,
Electrical, Food, Metallurgy,Coal-to-liquids, long distance
pipeline and various industrial facilities.
Workshop
Packaging
FAQ:
Q1: Are you a Manufacture or trading company?
A: We are a professional Manufacture factory, we have been in Valve
field more than 15 years. Our factory
is located inZigong City, Sichuan Province
Q2: What’s your MOQ?
A: Low MOQ,1 Set.
Q3: Can you provide OEM and customized product?
A: Yes, we can.
Q4: Do you offer guarantee for the products?
A: Yes, we offer 1 year warranty to our products.
Q5: Why Choose Weite Valve?
A: 1. We are manufactory, we can provide cost effective products.
2. We have full experience in valve industrial, both our sales team
and technical engineers can provide you
professional solution.
