UL/FM 300PSI Resilient Wedge NRS Gate Valve - Grooved End Z85-300A

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Gate Valve

Compliance Credentials: Strictly certified to UL 260 and FM standards for high-hazard critical infrastructure

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UL/FM 300PSI Resilient Wedge NRS Gate Valve - Grooved End Z85-300A

▏Product Description

Ningjin APC Industries offers a complete package of resilient wedge gate valves featuring an excellent ductile iron structure, stable sealing capability, and popular end connection options. As a leading 300PSI NRS Grooved End Gate Valve Manufacturer, we engineer the Z41-300A series to fully conform to the ANSI/AWWA C515 design standard. The grooved ends are precision-machined to comply with ANSI/AWWA C606 or Metric standards, ensuring quick, reliable, and cost-effective installation in modern piping networks.

Designed for demanding applications, this Non-Rising Stem (NRS) gate valve delivers a maximum working pressure of 300PSI and a maximum testing pressure of 600PSI, with performance conforming strictly to FM 1120/1130, UL 262, and ULC/ORD C262-92. It is fully certified by UL, cUL, and FM, and holds NSF/ANSI 61 & NSF/ANSI 372 lead-free certifications, making it completely safe for potable water systems. The valve is highly versatile and comes with an operating nut that seamlessly integrates with vertical indicator posts or wall-type indicators. It is widely applied in outdoor and indoor fire inflow water, water supply and drainage, potable water lines, high-rising building fire-fighting systems, and industrial factory building fire protection networks.

Key Product Features

Premium Material Construction: The valve body, bonnet, disc, gland, and operating nut are all produced with high-grade ductile iron material. This provides superior strength-to-weight ratios to guarantee high structural integrity and long-term durability.

Extended Service Life: Engineered for exceptional reliability, the resilient wedge seat successfully passes an endurance cycling test of at least 5,000 times, ensuring low maintenance and extended operational lifespans.

Obstruction-Free Flow: The bottom of the gate valve adopts a straight-through design, leaving no valleys or pockets where foreign matter can store. This ensures a smooth, full-bore flow and highly reliable bubble-tight sealing.

Advanced Self-Sealing Design: The connection between the bonnet and body features a self-sealing mechanism. As the system pressure rises within the allowable operational range, the sealing joint automatically tightens to prevent leakage.

Operator Safety & Stem Protection: Equipped with a multiple O-ring sealing structure, the stem remains completely protected under pressure during both routine operation and maintenance, ensuring absolute safety for field operators.

Flexible Configurations: The valve features an NPT plug on the body along with two operating nuts. It is available in both "With Post Flange" and "Without Post Flange" options to fit diverse field layout specifications.

Superior Corrosion Resistance:The interior and exterior surfaces are completely coated with a high-quality epoxy finish applied via electrostatic spray, providing excellent corrosion protection. Custom coatings are also available upon request.

▏Technical Features

Parameter Item	Parameter Value
Design Standard	ANSI/AWWA C515
Groove Standard	ANSI / AWWA C606 or Metric
Face to Face Standard	ASME B16.10
Sizes	2"(FM) 2.5", 3", 4", 5", 6", 8", 10", 12" (FM UL)
Approvals	FM, UL, cUL, NSF / ANSI 61 & NSF / ANSI 372
Maximum Working Pressure	300PSI
Maximum Testing Pressure	600PSI
Pressure conforms to	FM 1120 / 1130, UL 262, ULC / ORD C262-92
Working temperature range	0~80°C / 32~176°F
Coating Details	Epoxy or Coating upon request
Body Features	NPT plug on body with 2 operating nuts
Lead-free Certification	Certified lead-free by NSF / ANSI 61 & NSF / ANSI 372 is available
Post flange	With and Without Post Flange are available

▏Valve Material List

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 Steel 1045
9	Plug	Stainless Steel 304 or Steel 1045
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

▏Dimensions

Size	DN	L	F	D	E	G	H
2"	50	178	15.9	60.3	57.2	7.9	292
2½"	65	190	15.9	73	69.1	7.9	292
2½"	65	190	15.9	76.1	72.3	7.9	292
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	416
5"	125	254	15.9	141.3	137	9.5	416
6"	150	267	15.9	165.1	160.8	9.5	451
6"	150	267	15.9	168.3	163.9	9.5	451
8"	200	292	19	216.3	211.6	11.1	534
8"	200	292	19	219.1	214.3	11.1	534
10"	250	330	19	273	268.3	12.7	635
12"	300	356	19	323.9	318.3	12.7	720

▏FAQ

📌 Q1: What structural manufacturing standards and raw materials guarantee the engineering reliability of this 300PSI grooved gate valve?

➔ A1: The valve fully conforms to the strict ANSI/AWWA C515 design standard. It is produced by a premium 300PSI NRS Grooved End Gate Valve Manufacturer utilizing high-strength ductile iron material for the valve body, bonnet, disc, gland, and operating nut to deliver an optimal strength-to-weight ratio. Furthermore, it features premium Stainless Steel 304 or Steel 1045 for the stem and a durable CF8 or C95400 stem nut to guarantee long-term mechanical endurance under high structural load.

📌 Q2: Can this Non-Rising Stem (NRS) gate valve safely handle high-pressure commercial fire protection and drinking water networks?

➔ A2: Yes, it is fully engineered to handle a maximum working pressure of 300PSI and a maximum testing pressure of 600PSI, with pressure performance conforming perfectly to FM 1120 / 1130, UL 262, and ULC / ORD C262-92 specifications. For safety and compliance, it holds official UL, cUL, and FM approvals, alongside certified lead-free credentials via NSF / ANSI 61 & NSF / ANSI 372. This makes it perfectly suited for high-rising building fire-fighting systems, indoor/outdoor fire inflow water, and municipal potable water delivery.

📌 Q3: How does the resilient wedge design prevent fluid leakage and extend the valve's field service life?

➔ A3: The valve utilizes an advanced straight-through flow design at the bottom, ensuring zero valleys or pockets where foreign matter can accumulate, guaranteeing a smooth flow and an airtight seal. It features an innovative self-sealing architecture between the bonnet and body that automatically tightens as internal pressure increases within the allowable range. Additionally, the resilient seat is rated to successfully pass an endurance cycling test of at least 5,000 times.

📌 Q4: What sizing choices and pipeline connection standards are available for large-scale project procurement?

➔ A4: Sourcing directly from an established 300PSI NRS Grooved End Gate Valve Manufacturer provides access to a comprehensive size array: 2" (holding FM approval), and 2.5", 3", 4", 5", 6", 8", 10", and 12" (all holding dual FM & UL approvals). The pipe connection ends are precision-grooved to seamlessly fit either ANSI / AWWA C606 or Metric piping dimensions, supporting flexible layout adjustments with face-to-face dimensions matching ASME B16.10.

📌 Q5: Is this NRS gate valve model compatible with indicator posts, and what are its operator safety features?

➔ A5: Yes, all NRS gate valves are explicitly designed with an operating nut configured for smooth installation with vertical indicator posts and wall-type indicators. For enhanced field safety and simple maintenance, the stem is built with a multiple O-ring sealing structure that keeps the stem fully protected under pressure, ensuring zero risk of pressure blowouts or injury to the operator. The body is also equipped with a built-in NPT drainage plug and two operating nuts, available in both "With Post Flange" and "Without Post Flange" variants.

▏Why Partner with Ningjin APC Industries

Global Certifications & Full Compliance: We offer a comprehensive suite of fire protection solutions. Our complete product lines—including fire butterfly valves, gate valves, alarm valves, deluge valves, and fire hydrants—are fully certified and hold world-class approvals such as UL, FM, NSF, VdS, CE, and CCC.

Short & Reliable Delivery Cycles: With optimized manufacturing processes and robust inventory management, we guarantee rapid production and short lead times to keep your large-scale engineering projects running on schedule.

Flexible OEM Capabilities: We provide professional, full-scale OEM services. From custom coatings to specific technical configurations, we can tailor our valve manufacturing to perfectly match your brand and regional market standards.

Unmatched Price Advantage: Experience the premier cost-effective alternative to major international legacy brands. We offer identical heavy-duty build quality, precision engineering, and safety ratings, making us the top choice for projects looking to optimize procurement budgets without compromising on reliability.

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