Gate Valve
| Price: |
Negotiable |
| Min Order: |
1 |
The gate valves manfactured by Chaoda Company include API&JIS gate valve, API603 gate valve, parallel gate valve, forged steel gate valve, jacketed gate valve, cryogenic gate valve, bellow sealed gate valve.
Design and Manufacture: Cast steel gate valve to API 600 (ISO 10434)or API 6D; Cast stainless steel gate valve to API 603 or API 600; Forged steel gate valve to API 602.
Inspection and Test: API 598, API 600 or API 6D.
End flange dimension: ASME B16. 5(for NPS<=24); ASME B16. 47 series B, API 605 or ASME B16. 47 series A, MSS SP-44(for NPS>24).
BW end dimension: ASME B16. 25.
Socket-weld dimension: ASME B16. 11.
Face to face and end to end: ASME B16. 10.
Pressure-temperature ratings: ASME B16. 34.
Design of Disc:
Gate Valves with NPS >=2 are of wedge flexible gate; Gate valves with NPS < 2 are of wedge solid gate.
Body and Bonnet:
The body and bonnet of Class150~Class900 check valves are usually with studs and nuts. And the body and bonnet of Class1500~Class2500 check valves are usually of pressurized seal design.
Body and Bonnet Connection
The body and bonnet of Class 150 ~ Class 900 gate valves are usually connected with studs and nuts. And the body and bonnet of Class 1500~Class 2500 gate valves are usually of pressurized seal design.
Gasket of Cover Flange:
Carbon steel or stainless steel + flexible graphite combined gasket is used for Class 150 gate valve; Stainless steel + flexible graphite wounded gasket is used for Class 300 gate valve; Stainless steel + flexible graphite wounded gasket is used for Class 600 gate valve, and ring joint gasket is also optional for Class 600 gate valve; Ring Joint gasket is used for Class 900 gate valve; Pressurized seal design is used for Class 1500 ~Class 2500 gate valve.
Actuation:
Hand wheel or gear box is usually used for gate valve actuation. Chain wheel and electric actuator can be also used for gate valve actuation if being requested by the customers.
Packing Seal:
Molded flexible graphite is used for packing material. PTFE or combined packing material can be also used if being requested by the customer. The internal surface of the stuffing box, of which area is contacted with the packing, is of excellent finish. The stem surface, contacting with the packing, should be rolled and pressed after being precisely machined, so as to reach to the high finish and compactness and ensure the reliable tightness of the stem area.
Belleville Spring Loaded Packing Impacting System:
If being requested by the customer, the Belleville spring loaded packing impacting system can be adopted for enhancing the durability and reliability of the packing seal.
Back Seating Design:
All our gate valves have the back seating design. In most cases, the carbon steel gate valve is fitted with a renewable back seat. For stainless steel gate valve, the back seat is machined directly in the bonnet or is machined after welding. When the gate valve is at fully open position, the sealing of the back seat can be very reliable. However, as per the requirement of API 600, it is not advisable to add or change packing by the mean of back seating when the valve is pressure containing.
Special Gate Valve:
Besides the common gate valves, Chaoda Company also makes cryogenic gate valve, Jacketed Gate Valve, Bellow Sealed Gate Valve, Extension Stem Gate Valve for underground application, Flat Gate Valve, etc.
Zhejiang CHAODA Valve Co., Ltd. was founded in the year of 1984, covering an area of 38000m2, including factory structural area of 22811m2, with 382 staffs and 230 sets of various facilities, such as Machining Center, CNC Lathe, CNC Miller, Common Lathe, Boring Machine, Miller, Driller, etc. In the year of 2004, CHAODA had a turnover of 15 million USD, of which 6 million USD was from exportation. The company possesses advanced and complete chemical, physical and pressure test equipments.
The company's management strictly complies with the up-to-dated enterprise system, and its quality management system is running well and perfect. The company has attached great importance to the introduction and education for the scientific and technical staffs. The engineers and technicians, amounting to one fourth of the total staffs, of the company have laid a solid foundation of the technical innovation. The company has set up an educational training center, and insisted on training and educating the staffs and the management personnel, so as to improve continuously the whole ability and skill of the staffs.
The company mainly manufactures the valves according to ANSI, API, MSS, JIS, DIN, BS, NF and Chinese GB standards. The main products include Gate Valve, Globe Valve, Check Valve, Ball Valve, Plug Valve, Butterfly Valve, Special Safety Valve, Strainer, Flanges, etc. The reliable quality of our products have been approved and recognizes by ISO9001-2000, API 6D, API 600, API 607, CE and AZ. The size ranges from NPS 1/2 to NPS 64. The pressure ranges from Class 150 to Class 2500. The main materials of the products are WCB, WCC, C5, CA15, WC6, WC9, CF8, CF3, CF8m, CF3M, LCB, LCC, LC1, LC2, LC3, CN7M, A105, 304, 316, 304L, 316L, F11, F22, LF2, F51, etc. The products are widely used in the field of petroleum, chemical, metallurgical, power, fuel gas, city pipeline networks. The products have been exported to USA, Canada, Japan, Spain, France, Italy, England and other countries. With high content of technology and reliable quality, our products have gained good fame from the customers.
The company has set up an advanced informationization management system. Our LAN with 108 pieces of computers compose of the ERP and PDM management system, Facing the furious competition of the valve market, we will fully exert our advantage on technology and management to improve continuously our product quality and manufacture high quality valve product to satisfy the customers.
