Flanged End Resilient Wedge NRS Gate Valve Z45-300

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 Flanged End Resilient Wedge NRS Gate Valve Z45-300? What is the NRS gate valves?
Flange end resilient wedge NRS (no rising stem) gate valve Z45-300 is a special type of gate valve designed for a variety of applications, especially in water distribution systems and industrial processes. Let’s analyze its main features:
1. Flange End: The valve has a flange end that provides a secure bolt connection to the pipe in the piping system. Flanges are commonly used to connect valves in water, wastewater and industrial systems.
2. Elastic wedge: The elastic wedge design uses a flexible wedge made of materials such as rubber or EPDM. This design ensures a tight seal even if debris or sediment is present in the pipe. It helps the valve provide reliable flow control.
3. NRS (no rising(hidden) stem): The concealed stem design means that the valve stem of the valve will not move vertically when the valve is operated. In a concealed stem gate valve, the valve stem remains in a fixed position while the gate plate moves up and down to control the flow. This design is often preferred in applications where space above the valve is limited.
4. Z45-300: This designation may refer to a specific model or size of valve. “300” may indicate a pressure rating of 300 pounds per square inch (PSI), which is often used to indicate the maximum pressure a valve can handle.
The NRS gate valve is a gate valve whose stem does not rise or extend when the valve is open. Instead, a gate inside the valve moves vertically to control the flow of fluid. This design is advantageous where space constraints or overhead obstructions prevent use of the riser bar.
The flange-ended resilient wedge NRS gate valve Z45-300 may be used in applications requiring reliable flow control, tight sealing and concealed stem design, such as water distribution networks, wastewater treatment plants and industrial processes. For detailed specifications and information on a specific Z45-300 valve, it is recommended to consult the product documentation provided by the manufacturer or contact them directly.

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.