Flanged x Grooved End Resilient Wedge OS &Y Gate valve Z481-300A

Size: 2″-12”(DN50-DN300)
Material: Ductile iron ASTM A536, 65-45-12/Cast Iron ASTM A126 Class B/EN-GJS-450-10/ ENJS1040
Dimension: AWWA C515,ASME B16.10,BS5163,AWWA C503, BS & DIN Standard, BS750,EN1074,BS EN14339, BS 5041, BS 5154
Connection: AWWA C606, ASME B16.1 CL 125, ISO 5211,ASTM A888, ISO 6182, BS EN 1092-2
Pressure Rating: 300PSI
Temperature: -10-120 ℃
Surface Treatment: ANSI/AWWA C550,Epoxy coated interior and exterior by Electrostatic
Certificate: UL Listed/FM Approved /NSF/ANSI61&NSF/ANSI 372
Medium: Water, gas etc.

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Product Description


What is the role of flange x grooved end resilient wedge OS and Y gate valves in fire protection systems? What are its sealing materials?
Flange x grooved end resilient wedge OS and Y gate valves play a vital role in fire protection systems by controlling the flow of water within the pipe network. Here are some key aspects of their role:
1. Flow Control: These valves are used to regulate the flow of water in fire protection systems. They can be strategically placed to isolate sections of pipes, allowing firefighters to direct water to where it is needed most during an emergency.
2. Emergency shutdown: In the event of a fire, these valves can quickly close to prevent water from flowing to a specific area. This helps prevent water waste and improves firefighting efficiency.
3. Versatile installation: The combination of flange end and grooved end provides installation flexibility. The flange allows for traditional bolting, while the grooved end allows for quick and easy installation using grooved couplings.
4. Elastic wedge design: The elastic wedge design enhances the sealing ability of the valve. Flexible wedges, often made from materials such as rubber or EPDM, ensure a tight seal even if debris or sediment is present in the pipe.
5. OS & Y Features: External screw and yoke design provides visible indication of valve position. This allows operators to easily confirm whether a valve is open or closed, aiding maintenance and emergency response.
As for the sealing material, the elastic wedge is a key component in forming a tight seal and is usually made of elastomeric material. Common materials include rubber or EPDM (ethylene propylene diene monomer). These materials were chosen for their flexibility, durability and ability to withstand water and environmental factors.
It is important to note that the specific materials used may vary from manufacturer to manufacturer, and material selection may be influenced by factors such as the intended application, compatibility with the fluid being transported, and compliance with industry standards. If you have a specific valve model, referring to the manufacturer’s documentation or contacting them directly will provide accurate information on the sealing materials used for that specific valve.

Product Drawing

Size DN D F D2 E G H
2 1/2″ 65 190 178 15.9 73 69.1 7.9 370
76.1 72.3
3” 80 203 191 15.9 88.9 84.9 7.9 420
4” 100 229 229 15.9 114.3 110.1 9.5 447
5” 125 254 254 15.9 139.7 135.5 9.5 547
141.3 137
6” 150 267 279 15.9 165.1 160.8 9.5 607
168.3 163.9
8″ 200 292 343 19 216.3 211.6 11.1 754
219.1 214.3
10” 250 330 406 19 273 268.3 12.7 890
12” 300 356 483 19 323.9 318.3 12.7 1031
NO. Name Material
1 Gasket Stainless Steel 304 or C95400
2 Bonnet Ductile Iron
3 Packing Graphite
4 Disc Ductile Iron +EPDM
5 Body Ductile Iron
6 Sealing Ring EPDM
7 Bolt Stainless Steel 304 or Steel 1045
8 Gland Ductile Iron
9 Nut Stainless Steel 304 or Steel 1045
10 Flat Washer Stainless Steel 304 or Steel 1045
11 Bolt Stainless Steel 304 or Steel 1045
12 Handwheel Ductile Iron
13 Lock Nut C95400
14 Locating Screw Stainless Steel 304 or Steel 1045
15 Stem Stainless Steel 304 or C95400
16 Stem Nut C95400
17 Plug C95400
18 Lifting Nut CF8 or C95400
19 Pin Stainless Steel 304
20 Sealing Ring EPDM

Quality Control

Advanced equipment guarantee the production of high quality products.
Advantages of DISA moulding line:1. High quality precise casting less scrap and lower finishing costs. 2.High Production Efficiency(1)Fast production: 350 moulds per hour, pattern changing time cut down to 2-3 minutes
(2).higher profitability over a longer service life. 3. Safety and Environmental Friendly safe, easy and clean operation (CE and ISO 14001 compliant)
High-precision, hydraulicly driven mould transport,no shifting, distortion, ordisplacement of moulds.
The advantage of the sand supply system:The sand supply system is from the best class sand processing equipment manufacturers of China, with straight structure, easier maintenance, environmently friendly, high degree of automation, high safety factor, good parameters of sand stability.
Fluid Tech Group is honored as the National enterprise technical center and is capable and qualified to conduct full series of tests and inspections including chemical checking, etc. Inspection facilities include:spectrometer, carbon sulfur analyzer, metallurgical microscope, tensile strength testing equipment, pressure testing equipment, adhesive force testing equipment, CMM, hardness tester, etc.From incoming inspection to finished product, quality is checked a
nd monitored in the whole process. Each step of the manufacturing process is carefully documented, regularly reviewed for revision control and updatin
g standard. Quality procedures are constantly monitored and updated to assure that only the highestand most consistent quality products are supplied to our valued customers.

Application and Case

Products are used in fire protection system, water system, HVAC system, plumbing, gas system, irrigation system, etc.These products are used in many projects , such as China Taiwanese Building 101, Xiamen Building,Wuhan Expo Building and other famous landmark projects.


1. What is the minimum quantity of the order?
Answer: The purchase volume of mixed products is 4 tons
2. How long is the delivery time of the order?
Answer: The delivery time for general orders is about 30 days. If the order is urgent and we have stock, around 7 days.
3. What payment methods do you accept?
Answer: We accept payment terms such as TT, L/C, DP, Western Union, Paypal, etc.
4. Where is your departure port of shipment? Is it possible to deliver to the designated warehouse?
Answer: The port of departure of our goods is generally Tianjin Port or Qingdao Port. We can transport the goods to designated warehouses, such as Yiwu, Guangzhou, etc.
5. What certificates do your products have?
Answer: Our products have FM/UL certificates, and we cooperate with third-party quality inspection certification before the factory, such as SGS,TUV
6.What are the series of your products?
Answer: Our products are divided into heavy series, medium series and light series according to different markets and standards. In order to buy more competitive products for you, please communicate your purchasing needs with the salesperson.
7. Do product packaging cartons and labels support customization?
Answer: Packaging cartons and labels can be customized according to customer requirements.
8.Does the purchased product support customization?
Answer: The product supports customization, but there are purchase quantity requirements and mold costs. For details, please consult the salesperson.
9.What are the packaging methods of the product?
Answer: The packaging of the product includes carton packaging, pallet packaging, wooden box packaging, and woven bag packaging.