Instruction of gate valve
Specification:
Size: 1/2"~24"
Pressure: 150LB~1500LB
Material: WCB, WCC, LCB, LCC, WC6, WC9, C5, C12, CF8, CF8M, CF3, CF3M, CF8C, CN7M,Etc
Operation: Hand wheel. Gear, electricty, etc.
Standard:
Design & Manufacture Std.: API6D,API 600, ANSI B16.34,Etc.
Face to Face Std.: ANSI B16.10,Etc.
End Connection Std.: ANSI B16.5,Etc.
Test Pressure: API 598,Etc.
Manufacturing Process
STANDARD
All products are manufactured in accordance with the guidelines of International Standard accepted all over the world such as Manufacturers Standardisation Society (MSS), American Petroleum Institute (API), American Society of Mechanical Engineers (ASME), British Standard (BS), Bureau of Indian Standard (BIS).
PROCURMENT OF RAW MATERIAL
In the manufacturing process we require Castings of different grades, Stainless steel Bars, forgings, hardware, gaskets & paints. All raw material purchase from the reputed & genuine concerned supplier.
QUALITY CONTROL
All raw materials are checked by our Quality Assurance Department prior to manufacturing process. For an example, when we received the castings, it is checked visually and dimensionally for machining tolerance. We also check the foundry chemical Test Certificate and physical test certificate, compared to suitable international standard and passed to machining shop for the further process, if it is rejected it is send back to the supplier.
MACHINING
The raw material issued to the machine shop for the machining, is machined strictly as per the relevant drawings.
INPROCESS TESTING
If it is found OK dimensionally the valve body and bonnet are sent for the hydro testing. All internal parts such as seat, disc, stem are measured by the Vernier Caliper or micrometer, if it is found O K than pass to assembly section for the further assembly. All the valve body and bonnet are tested on the motorized pump or hand pump as per the relevant standard. The theory being, when the body or the bonnet is under pressure there should not be any leakage or drops of the testing fluid from any portion of the castings. If any leakage observed, it is rejected and sent back to the foundries.
ASSEMBLY
The body and bonnet, which are Hydrostatically O K, are sent to assembly section, duly handled with care to avoid the scratches on the machined surfaces. In the assembly section body and bonnet are drilled on drill machine with the help of jigs & fixtures for uniformity and interchangeability.
LAPPING
In metal to metal seated valves, seat & disc/plug are lapped by Rough Lapping Paste to smoothen the seating surface and than lapped with very fine grade lapping paste for the proper sealing of disc & seat surface, to ensure zero leakage.
TESTING
After assembly of new complete valve is sent for Hydrostatic Testing. If no leakage is found as per the relevant standard, it is sent to finishing section.
FINISING/PAINTING & PACKING
The valve body and bonnet is debarred and finished by flexible shaft grinders for better appearance. One coat of corrosion resistance primer (red oxide) is sprayed, and colored as per the codes, twice for superior surface look.
Valves are packed either in wooden boxes or Gunny bags duly protected by ends enclosures and soft material to avoid any damages during transit.
Material of Construction: |
|
Cast Iron |
: IS 210 Gr FG 200 |
|
Cast Carbon Steel |
: ASTM A 216 Gr WCB |
|
Cast Stainless Steel |
: ASTM A 351 Gr CF 8/CF 8M |
|
Forged Carbon Steel |
: ASTM A 105 |
|
Forged Stainless Steel |
: ASTM A 182 Gr F304 / F316 |
|
End Connection |
: Screwed AS PER BSP/BSPT/NPT |
|
Socketweld |
: AS PER ANSI B 16.11 |
|
Flanged |
: AS PER ANSI B 16.5 |
|
Pressure Rating |
: ASA 125#, 150#, 300#, 600#, 800# |
|
Engineering Option |
: Gear Operated, Electrical Actuated, |
|
Size Range |
: 15 mm to 300 mm |
Design & Testing International Standard: |
|
Valve Design |
: API 600 / API 602 / API 603 / IS 780 / BS 14846 |
|
Pressure Testing |
: API 598 |
|
Face To Face |
: ANSI B 16.10 |
|
Flange Drilling |
: ANSI B 16.5 / BS 10 Table / DIN / IS 6392 |
|
Butt Weld End |
: ANSI B 16.25 |
|
Socket Weld End |
: ANSI B 16.11 |
|
Screwed End |
: ANSI B 1.20.1(BSP/NPT) |
Fujian Minshan Fire-Fighting Co., Ltd. Was founded in 1982. Our company is one of the largest manufacturers producing the best quality and the most complete product lines of fire equipment in Fujian Province, China. The "Minshan" brand has won numerous national awards: "Top Ten Well-Known Brand of Chinese Fire Equipment Enterprises", "Top Ten Brand Customer Satisfaction of Chinese Fire Fighting Equipment Industry", "The Most Influential Brand of Fire Fighting Industry", "Fujian Famous Trademark", "Top Ten Commercial Credit Enterprise", "Top Ten National Enterprise", etc.
Our company has been the provincial advanced company continuously developing modern industrial facilities and office buildings since 1982. Our plant covers an area of 80, 000 square meters and we have more than 600 employees in our factory and subsidiaries. Our company integrates the R&D, quality, production and market as a large-scale system. Especially, we pay great attention to R&D and quality and our company has more than 60 technical engineers handling the strong technical strength, advanced production lines and complete inspection instruments.
With more than 30 years of professional manufacture experience, our product line now extends to the series as follows:
Hydrant:
-Indoor regular and Rotary Fire Hydrant;
-Indoor and Outdoor Pressure Reducing & Steady Fire Hydrant;
-Outdoor Fire Hydrant (Landing Fire Hydrant and Underground Fire Hydrant);
-Landing Dash-against Fire Hydrant;
-Aqueous Film-Forming Foam Hydrant;
Nozzle:
-Fire Nozzle (Euro and US Fire Nozzle);
Coupling:
-Fire Coupling (Fire Hose, Screw, Reducing Coupling);
Hose:
-Lined Fire Hose;
-Fire Hose Reel;
Adaptor:
-Fire Pump Adaptor (Types Include Landing, Underground, Sidewall, Multipurpose);
Cabinet Set:
-Fire Hydrant Cabinet;
-Fire Extinguishing Cabinet;
Automatic Series:
-Automatic Fire Extinguishing System (all series of fire, early suppression fast response, extended coverage and window sprinkler; Water curtain and water mist nozzle; Wet valve, dry and deluge alarm valve, signals gate valve, butterfly valve, globe valve; Pre-action system, water flow detector, fire pressure switch, etc. );
-Gas Automatic Fire Extinguishing System
-Fire Alarm Buttons and Escape Device Series, etc.
Today, our domestic market covers over 20 provinces in China and our products sell in many foreign areas like South Asia, the Middle East and North America. The annual production capacity is over 900, 000 sets. We implement our quality management system strictly for our every single product and conduct the following national standards: China Compulsory Product Certification (CCC Certificate) by CCCF and Certificate of Product Type Approval by Ministry of Public Security of People's Republic of China. We have passed ISO9001 certification and can meet many specified standard requirements from the worldwide markets.
We wish to cooperate with friends from all over the world to make a better future together!
