Flanged End Resilient Wedge NRS Gate Valve Z45-300A

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


Flanged End Resilient Wedge NRS Gate Valve Z45-300A How to seal and connect? What are his standards?
Sealing and connecting flange end resilient wedge NRS gate valves such as the Z45-300A require proper installation procedures and compliance with relevant standards. Here are the general guidelines:
Sealing and connection:
1. Flange connection:
Make sure the flange faces are clean, smooth and free of any chips or defects. Place gaskets between flange faces. The gasket material should be suitable for the fluid being transported and the conditions of use. Align the bolt holes of the valve flange with the bolt holes of the pipe flange. Thread the bolts through the holes and tighten crosswise to ensure even pressure on the gasket.
2. Wedge and seat seal:
The elastic wedge is designed to form a tight seal against the valve seat when the valve is closed. Make sure the wedge and seat surfaces are clean and free of any contaminants. During installation, make sure the valve is in the fully open position to allow easy placement of the spring wedge.
3. Concealed stem: As a concealed stem valve, the valve stem will not move vertically during operation. Make sure the valve stem is properly aligned and lubricated to allow the gate to move smoothly.
4. Bypass and ventilation:
Consider incorporating bypass lines to facilitate maintenance and testing without shutting down the entire system.
Provide ventilation points to remove air from the system during installation and operation.
Standards to which the Flange End Resilient Wedge NRS Gate Valve Z45-300A may comply may include:
AWWA (American Water Works Association) Standards: Valves designed for water and wastewater applications typically adhere to AWWA standards such as AWWA C509 or AWWA C515, depending on the valve type and application.
ANSI/ASME Standards: Flanges and flange connections typically follow ANSI/ASME standards, such as ANSI/ASME B16.1 or ANSI/ASME B16.5.
Material Standards: Ensure materials used in valve construction comply with relevant ASTM (American Society for Testing and Materials) standards.
Testing Standards: Valves may be tested to standards such as AWWA C509 or other applicable industry standards to ensure performance and reliability.
Be sure to refer to the manufacturer’s documentation for specific guidelines related to the Flange End Resilient Wedge NRS Gate Valve Z45-300A. When in doubt, consult the manufacturer or a qualified professional to ensure proper installation and compliance with standards for your specific application.

Product Drawing

Size DN L D H
22” 65 190 178 292
3” 80 203 191 322
4” 100 229 229 342
5” 125 254 254 412
6” 150 267 279 448
8” 200 292 343 534
10″ 250 330 406 635
12″ 300 356 483 720
NO. Name Material
1 Flat Washer Steel 1045 or Stainless Steel 304
2 Inner Hexagon Screw Steel 1045 or Stainless Steel 304
3 Sealing Gland EPDM
4 O-Ring EPDM
5 Sealing Ring EPDM
6 O-Ring EPDM
7 Bonnet Ductile Iron
8 Stem Stainless Steel 304
9 Disc Ductile Iron +EPDM
10 Body Ductile Iron
11 Sealing Ring EPDM
12 Retaining Ring C95400
13 Gland Ductile Iron
14 Terminal Pad Ductile Iron
15 Link Block Ductile Iron
16 Nut Stainless Steel 304 or Steel 1045
17 Studs Stainless Steel 304 or Steel 1045
18 Washer Steel 1045
19 Inner Hexagon Screw Steel 1045
20 Master Screw C95400
21 Plug C95400

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.