Grooved End Resilient Wedge NRS Gate Valve Z85-300

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 the Grooved End Resilient Wedge NRS Gate Valve Z85 ? How to working in the fire Piping Systems ?

The primary difference between the Grooved End Resilient Wedge NRS (Non-Rising Stem) Gate Valve Z85-300 and the Grooved End Resilient Wedge OS&Y (Outside Screw and Yoke) Gate Valve lies in the design of the stem and how it moves during operation. Let’s break down the key distinctions:

Grooved End Resilient Wedge NRS Gate Valve Z85-300:
1.NRS (Non-Rising Stem):
The stem of the valve does not move vertically during operation.
Instead, the gate, which controls the flow of fluid, moves up and down.
This design is advantageous in applications where vertical space is limited.
2.Grooved End:
The valve has grooved ends, allowing for quick and efficient installation using grooved couplings.
Grooved connections facilitate easy and flexible installation without the need for welding or threading.
Grooved End Resilient Wedge OS&Y Gate Valve:
3.OS&Y (Outside Screw and Yoke):
The stem of the valve moves vertically outside the valve body when the valve is operated.
The movement of the stem provides a visual indication of the valve’s position (open or closed).
The Yoke is the supporting structure that holds the stem and allows it to move in a controlled manner.
4.Grooved End:
Similar to the Z85-300, this valve has grooved ends for convenient installation using grooved couplings.

Considerations for Application:
1.Space Limitations:
If the installation has limited vertical space, the NRS design (Z85-300) may be preferred due to its non-rising stem.
In applications where the stem’s vertical movement is not a constraint, the OS&Y design offers a visible indication of the valve’s position.
2.Visual Indication:
The OS&Y design provides a clear visual indication of whether the valve is open or closed, aiding in maintenance and emergency response.
3.Installation Ease:
Both valves have grooved ends, ensuring ease of installation with grooved couplings. The choice may depend on other factors specific to the installation requirements.

In summary, while both valves share the convenience of grooved ends for installation, the key difference lies in the stem design—NRS (Z85-300) with a non-rising stem and OS&Y with an outside rising stem. The selection between the two would depend on factors such as space limitations, visual indication preferences, and specific application requirements.

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.