UL/FM NPT or BSPT Type Air Release Valve

Model: AMARV
Date Updated: August 17, 2026
Prepared by: Fire Protection Valve Technical Department

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Ningjin APC Industries is a premier UL & FM certified manufacturer in China, delivering high-performance industrial and fire protection valves built to strict international safety standards.

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UL/FM NPT or BSPT Type Air Release Valve

▏Product Description

The AMARV NPT or BSPT Type Air Releasing Valve engineered by Ningjin APC Industries is a high-performance, automatic air release valve designed specifically for fire protection systems and municipal water infrastructure. Manufactured with a heavy-duty ductile iron body and stainless steel internal trim, this 175 PSI rated valve efficiently exhausts accumulated air pockets during initial line filling and continuous system operation. Preventing air binding in wet pipe sprinkler systems and horizontal split case pump installations ensures optimal fluid velocity, prevents hydraulic surge, and minimizes internal piping corrosion. Operating across temperatures from 0°C to 100°C (32°F to 212°F), the valve design and pressure testing conform to UL 2573 and FM1344 standards. Featuring versatile 1" NPT and BSPT threaded inlet options paired with 1/2" outlet ports, this 175 PSI NPT or BSPT type air releasing valve delivers superior leak tightness and automatic venting for MEP engineers, EPC contractors, and fire safety procurement managers worldwide. Custom-manufactured with a standard 45 working days lead time, each unit provides reliable protection for commercial and industrial fire safety networks.

▏Technical Features

Parameter Item	Specification / Value
Inlet Size	1"
Inlet & Outlet Specification	The inlets of the valves are 1-11 1/2NPT or BSPT 1", the outlets of the valves are 1/2-14NPT or BSPT 1/2"
Design Standard	in accordance with UL 2573 / FM1344
Test Standard	Pressure conforms to UL 2573 / FM1344
Working Temperature Range	0~100°C /32~212°F
Working Pressure	175PSI
Test Pressure	Leakage Test 7PSI / 263PSI, Strength Test 350PSI
Advantages	This valve can ensure the excellent leak tightness and good venting capabilities under the rated working pressure.
Application	Use in wet pipe sprinkler systems, or with horizontal split case pumps.

▏Valve Material List

S./N.	Description of Parts	Materials
1	Valve Body	Ductile Iron
2	Filter Screen	SS316
3	Gasket Ring	Carbon Steel
4	Bonnet	Ductile Iron
5	Yoke	SS316
6	Valve Seat	SS316
7	Bolt	SS316
8	Valve Shaft	SS316
9	E Type Retainer Ring	SS304
10	Ball	SS316
11	Large Protective Cover	Plastic
12	Lever	SS316
13	Poppet	EPDM
14	Spring Washer	SS316
15	Hex Socket Head Bolt	SS304
16	Asbestos-free Gasket	CN-705
17	Spring Washer	Carbon Steel
18	Bolt	Carbon Steel
19	Plug	Ductile Iron
20	Small Protective Cover	Plastic

▏Connections for Installation

The inlet connections conform to 1-11 1/2NPT tapered pipe thread standards (ASME B1.20.1-2013), and the outlet connections conform to 1/2-14NPT tapered pipe thread standards (ASME B1.20.1-2013).
The inlet connections conform to BSPT 1" tapered pipe thread standards (ISO 7-1-1994), and the outlet connections conform to BSPT 1/2" tapered pipe thread standards (ISO 7-1-1994).

▏Frequently Asked Questions

1. What are the primary applications and system design standards for the AMARV NPT or BSPT Type Air Releasing Valve?

The AMARV NPT or BSPT Type Air Releasing Valve is engineered specifically for fire protection systems, including wet pipe sprinkler systems and horizontal split case pump installations. Designed in accordance with UL 2573 and FM1344 standards, this valve plays a critical role in venting entrapped air pockets during initial system fills and normal operation. Eliminating air pockets prevents water hammer, flow restrictions, and internal corrosion, thereby safeguarding system integrity. As a trusted 175 PSI NPT or BSPT type air releasing valve supplier, Ningjin APC Industries manufactures these units with precision-machined ductile iron bodies and stainless steel internal components. This ensures dependable automatic air release and long-term operational performance under rated operating conditions for commercial and industrial fire protection networks.

2. What test standards and pressure ratings does the AMARV air release valve comply with during quality verification?

Quality verification for the AMARV air releasing valve follows rigorous testing protocols where pressure performance conforms strictly to UL 2573 and FM1344 standards. Each valve features a rated working pressure of 175 PSI and undergoes comprehensive factory testing to ensure zero operational failure. The hydrostatic strength test is conducted at 350 PSI to verify structural durability under high pressure surges. Additionally, leakage testing is performed at both low pressure (7 PSI) and elevated working pressure (263 PSI) to validate dynamic sealing capability. By specifying a UL 2573 compliant air release valve for fire protection, fire protection engineers and EPC contractors can guarantee bubble-tight sealing and reliable automatic air release, eliminating fluid leakage risks in high-demand sprinkler infrastructure.

3. What thread standards and connection options are available for installing the AMARV air releasing valve?

The AMARV series provides flexible threaded installation options engineered for seamless integration into global fire piping networks. For American standard installations, the 1" inlet features tapered pipe threads (1-11 1/2NPT) and the 1/2" outlet features tapered pipe threads (1/2-14NPT), both conforming to ASME B1.20.1-2013 standards. For metric or international piping systems, the valve is available with tapered pipe threads (BSPT 1" inlet and BSPT 1/2" outlet) conforming to ISO 7-1-1994 standards. When submitting an AMARV NPT or BSPT type air releasing valve RFQ, procurement managers can select the exact connection configuration required for their project specifications, ensuring effortless field installation and reliable sealing without piping modifications.

4. What materials are utilized in the Bill of Materials (BOM) to ensure corrosion resistance and seal integrity?

The AMARV air releasing valve is constructed with heavy-duty materials designed to withstand aggressive water environments and prevent mechanical wear. The valve body, bonnet, and bottom plug are fabricated from high-strength ductile iron, providing robust mechanical integrity. Critical internal trim components—including the filter screen, yoke, valve seat, shaft, ball, lever, bolts, and spring washers—are crafted from corrosion-resistant SS316 stainless steel, while retainer rings and hex socket head bolts utilize SS304. External bonnet fasteners utilize carbon steel bolts and spring washers for secure assembly. Tight elastomeric sealing is achieved through an EPDM poppet, supported by a CN-705 asbestos-free gasket and carbon steel gasket rings. Reviewing the complete ductile iron air release valve BOM specifications demonstrates how this material selection delivers exceptional corrosion resistance, zero leakage, and long service life across operating temperatures ranging from 0°C to 100°C (32°F to 212°F).

5. What lead time and customization options does Ningjin APC Industries offer for B2B fire protection valve orders?

Ningjin APC Industries operates as a leading B2B valve manufacturer, supporting custom-manufactured fire protection orders tailored to exact engineering specifications. Standard lead times for custom production are 45 working days, serving major fire safety projects across North America, the Middle East, and worldwide. Each unit is built to order, complete with protective plastic covers for shipment and factory surface coatings for enhanced durability. Contractors and distributors looking to buy AMARV air release valve directly from manufacturer benefit from competitive factory-direct pricing, certified quality management, and complete technical documentation. Our dedicated technical department collaborates directly with EPC firms and procurement specialists to deliver compliant, high-performance air releasing valves for wet pipe sprinkler systems and fire pump sets.

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