Grooved End Resilient Wedge NRS Gate Valve Z85-300A

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 difference between Grooved End Resilient Wedge NRS Gate Valve and Flanged End Resilient Wedge NRS Gate Valve, which one has more advantages in the fire protection system?


The choice between a Grooved End Resilient Wedge NRS (Non-Rising Stem) Gate Valve and a Flanged End Resilient Wedge NRS Gate Valve in a fire protection system depends on various factors, and both types have their advantages. Let’s compare the two:
Grooved End Resilient Wedge NRS Gate Valve:
1. Advantages:
Ease of Installation: Grooved ends allow for quick and efficient installation using grooved couplings, eliminating the need for welding or threading.Flexibility: Grooved systems are flexible and can accommodate some misalignment, making them easier to work with during installation.Space Efficiency: The non-rising stem design is beneficial in applications with limited vertical space.
2. Considerations:
Pressure Rating: Grooved systems may have slightly lower pressure ratings compared to flanged systems, so the specific pressure requirements of the fire protection system should be considered.

Flanged End Resilient Wedge NRS Gate Valve:
High Pressure Rating: Flanged connections often provide higher pressure ratings compared to grooved connections, making them suitable for high-pressure fire protection systems.Standardization: Flanged connections adhere to standard dimensions and specifications, ensuring compatibility with other components in the system.
2. Considerations:
Installation Complexity: Flanged connections may require more time and skill during installation compared to grooved systems.
Space Requirements: Flanged valves with rising stems may require more vertical space for operation.

Application Considerations for Fire Protection Systems:
1. Pressure Requirements:If the fire protection system requires high pressure handling, a Flanged End Resilient Wedge NRS Gate Valve with a higher pressure rating may be preferred.
2. Ease and Speed of Installation:For projects that prioritize quick and straightforward installation, the Grooved End Resilient Wedge NRS Gate Valve might be advantageous.
3. Space Limitations:
If the fire protection system is installed in a space with limited vertical clearance, the Grooved End Valve with a non-rising stem could be more suitable.
4. System Compatibility:
Consider the compatibility of the chosen valve type with other components in the fire protection system, such as pipes, fittings, and hydrants.

Ultimately, the selection between Grooved End and Flanged End Resilient Wedge NRS Gate Valves should be based on the specific requirements and constraints of the fire protection system. It’s advisable to consult with professionals experienced in fire protection engineering and adhere to relevant industry standards and codes.

Product Drawing

Size DN L F D E G H
2 1/2” 65 190 15.9 73 69.1 7.9 292
76.1 72.3
3″ 80 203 15.9 88.9 84.9 7.9 322
4” 100 229 15.9 114.3 110.1 9.5 342
5” 125 254 15.9 139.7 135.5 9.5 412
141.3 137
6” 150 267 15.9 165.1 160.8 9.5 448
168.3 163.9
8” 200 292 19 216.3 211.6 11.1 534
219.1 214.3
10” 250 330 19 273 268.3 12.7 635
12″ 300 356 19 323.9 318.3 12.7 720
NO. Name Material
1 Flat Washer Steel 1045 or Stainless Steel 304
2 Hexagon Socket Screw Steel 1045 or Stainless Steel 304
3 Sealing Ring EPDM
4 O-Ring EPDM
5 Sealing Ring EPDM
6 O-Ring EPDM
7 Bonnet Ductile Iron
8 Stem Stainless Steel 304 or C95400
9 Plug Stainless Steel 304 or C95400
10 Disc Ductile Iron +EPDM
11 Body Ductile Iron
12 Sealing Ring EPDM
13 Retaining Ring C95400
14 Gland Ductile Iron
15 Post Flange Ductile Iron
16 Wrench Nut Ductile Iron
17 Bolt Stainless Steel 304 or Steel 1045
18 Washer Stainless Steel 304 or Steel 1045
19 Hexagon Socket Screw Steel 1045 or Stainless Steel 304
20 Stem Nut CF8 or 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.