UL/FM 200PSI NRS Resilient Wedge NRS Gate Valve - Flanged End Z45

Date Updated: July 22, 2026
Prepared by: Fire Gate Valve Technical Department

Categories:

Gate Valve

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

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UL/FM 200PSI NRS Resilient Wedge NRS Gate Valve - Flanged End Z45

▏Product Description

As a globally trusted UL/FM gate valve manufacturer, Ningjin APC Industries delivers high-performance fire protection fluid control solutions designed for zero-fail performance in critical environments. Fully conforming to ANSI / AWWA C515 standards, our Resilient Wedge Gate Valves engineered with heavy-duty Ductile Iron bodies withstand high pressure conditions with a 200 PSI maximum working pressure rating and a 400 PSI hydro-testing threshold. Built to eliminate long-term field maintenance pain points, the valve features an unobstructed straight-through bottom flow path that prevents dirt and debris buildup, alongside a self-sealing bonnet design that increases seal tightness under rising internal pressures.

Whether integrated into OS&Y configurations with pre-grooved stems for instant tamper switch installation or NRS setups connected to vertical and wall indicator posts, our valves ensure seamless mechanical and electrical interoperability across high-rise building suppression networks, industrial plant mainlines, and potable water distribution lines. Explore the comprehensive dimensional parameters, metallurgical specifications, and international standard certifications detailed in the technical matrices below.

▏Technical Features

Flange Standard	ASME/ANSI B 16.1 Class 125 ASME/ANSI B 16.42 Class 150 BS EN 1092-2 PN 16 GB / T9113.1
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	200PSI
Maximum Testing Pressure	400PSI
Pressure Conformance	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 & Operation Features	NPT plug on body with 2 operating nuts
Environmental Certification	Certified lead-free by NSF / ANSI 61 & NSF / ANSI 372 is available

▏Valve Material List

NO.	Name	Material
1	Body	Ductile Iron
2	Disc	Ductile Iron+EPDM
3	Nut	C95400
4	Gasket	EPDM
5	Stem	Stainless Steel 304
6	Cap	Ductile Iron
7	Retainer Ring	C95400
8	O-ring	EPDM
9	Wrench Nut	Ductile Iron
10	Minipad	Steel 1045
11	Bolt	Steel 1045
12	Stud	Steel 1045
13	Nut	Steel 1045
14	Flat Washer	Steel 1045
15	Coupling Flange	Ductile Iron
16	Platen	Ductile Iron
17	Countersunk Head Bolt	Steel 1045

▏Dimensions

Size	L	H	øD
2"	178	265	152
2½"	190	289	178
3"	203	326	190
4"	229	355	229
5"	254	410	254
6"	267	455	279
8"	292	558	343
10"	330	648	406
12"	356	745	483

▏FAQ

📌 What compliance standards and certifications does Ningjin APC’s resilient wedge gate valve meet for fire protection projects?

Our valves fully conform to ANSI / AWWA C515 and hold UL, CUL, and FM approvals under standards UL 262, FM 1120 / 1130, and ULC / ORD C262-92. They support a maximum working pressure of 200 PSI and a testing pressure of 400 PSI. Additionally, they are certified lead-free under NSF / ANSI 61 & NSF / ANSI 372, making them ideal for both fire systems and potable water. As a qualified UL listed FM approved resilient wedge gate valve manufacturer, Ningjin APC guarantees full regulatory approval.

📌 How do APC OS&Y and NRS resilient wedge gate valves integrate with tamper switches and indicator posts?

APC OS&Y gate valves come equipped with tamper-resistant handwheel nuts and pre-grooved stems designed for seamless tamper switch installation. For underground or specialized fire mains, APC NRS gate valves feature installed operating nuts fully compatible with vertical indicator posts and wall type indicators. This engineered compatibility ensures reliable electrical signaling and mechanical status monitoring in automated fire suppression networks.

📌 How does the straight-through bottom design and multi O-ring structure prevent valve failure?

The valve utilizes a straight-through bottom flow design that prevents foreign debris from clogging the seating area, ensuring zero-leakage closure. The stem features a multiple O-ring sealing structure using EPDM, allowing inline stem seal maintenance under pressure without risking damage to operators. Furthermore, the self-sealing bonnet enhances joint tightness as pressure increases, proven through 5000-cycle resilient seat testing.

📌 What metallurgy and coating specifications are used in APC ductile iron gate valves?

The valve body, bonnet, cap, wrench nut, coupling flange, and platen are cast from high-strength Ductile Iron. The disc uses a Ductile Iron core encapsulated in EPDM. Internal nuts and retainer rings utilize C95400 bronze, paired with a SS304 stainless steel stem and Steel 1045 fasteners. All interior and exterior surfaces are protected by electrostatic spray epoxy coating for superior corrosion resistance within a working temperature range of 0~80°C (32~176°F).

📌 What flange standards and dimensional ranges are available for engineering RFQs?

APC valves are manufactured to ASME B16.10 face-to-face dimensions across nominal pipe sizes from 2" to 12" (2" FM certified; 2.5" through 12" FM and UL certified). End flanges accommodate multiple global piping standards, including ASME/ANSI B16.1 Class 125, ASME/ANSI B16.42 Class 150, BS EN 1092-2 PN 16, and GB/T9113.1. This ensures direct drop-in replacement and alignment with existing municipal or industrial piping layouts.

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