API · ASME · DIN · EN standard industrial valves
Combination Air Release Valves
Combination air release valves pair an air/vacuum function with a continuous air-release function in one assembly: they exhaust large air volumes at pipeline start-up, release accumulated air pockets during operation, and admit air on drainage to protect against vacuum and surge — the standard high-point valve for clean-water transmission and the severe-duty version for wastewater mains. The range covers single-body clean-water assemblies in 1"-8" and dual-body assemblies in 10"-20" (VM-200C/201C/206C lines with single-body SuperValve variants), wastewater single-body assemblies in 1"-4" (801A/801AS/803A lines including an all-stainless construction), NSF 61/NSF 372 drinking-water certification, AWWA C512 compliance, T316 stainless steel floats and 316 stainless internal trim with resilient high/low-pressure seating. Selection turns on clean-water versus wastewater duty, single-body compactness versus dual-body independent maintenance, and the size band the main requires.
Part of the Air Release Valves family
Last updated: 2026-11
Family specifications
| function | Air/Vacuum function: exhausts large quantities of air at system start-up, admits air on shut-down, Air Release function: releases air pockets continuously during system operation, Provides pipeline vacuum protection |
|---|---|
| size range | 1" - 8" |
| size range | 10" - 20" |
| size range | 1" - 4" |
| clean water models | VM-200C-S: 1" - 20", 201C single body (VM-201C-M): 1" - 4", 206C single body (VM-206C-M): 6" - 8" |
| wastewater models | 801A single body (VM-801A-M): 1" - 2", 801AS single body all stainless steel (VM-801AS-M): 1" - 4", 803A single body (VM-803A-M): 3" - 4" |
| certifications | NSF 372 Certified Lead-Free, NSF 61 Certified for Drinking Water, Meets AWWA C512, Manufactured under a certified ISO 9001 quality system |
| float material | T316 stainless steel |
| internal trim | Stainless steel 316 |
| seating | Exclusive high/low pressure resilient seating |
| arc size range | DN40 to DN200 |
| arc pressure rating | PN10, PN16 |
| arc ball type | Double ball |
| arc connection | Flanged |
| arc flange standards | EN 1092-2, ANSI B16.1/16.5/16.42, ISO 7005 |
| arc body bonnet materials | Ductile iron, cast steel, stainless steel |
| arc float material | ABS + EPDM |
| arc seal ring material | NBR/EPDM |
| ard size range | DN50 to DN200 |
| ard pressure rating | PN10, PN16 |
| ard ball type | Single ball |
| ard connection | Flanged RF |
| ard body material | Ductile iron |
| ard cap material | Carbon steel |
| ard ball material | SS201/SS304 |
| ard seal ring material | NBR |
| arx size range | DN50-DN300 |
| arx pressure rating | PN10, PN16, Class 125/150 |
| arx body materials | Ductile iron/carbon steel |
| arx ball material | Stainless steel 304 |
| arx temperature range | 0-80 deg C |
| arx medium | Water, oil, gas |
| arx structure | CARX compound air release valve, barrel-shaped body, integral large-orifice and small-orifice exhaust |
| ary size range | DN50-DN300 |
| ary pressure rating | PN10, PN16, Class 125 |
| ary body material | Ductile iron |
| ary ball material | Stainless steel 304 |
| ary temperature range | -20-180 deg C |
| ary medium | Water, oil, gas |
| ark body material | ASTM A216 WCB |
| ark nominal size | DN100 (4 inch) |
| ark design pressure | PN16, Class 150 LB |
| ark end connection | RF flanged |
| ark structure | Barrel-shaped body with float, stem and disc; large and small orifice |
| size range single body | Single Body sizes 1" - 8" |
| size range dual body | Dual Body sizes 10" - 20" |
| functions | Provides the functions of both Air Release and Air/Vacuum Valves |
| operating features | Exhausts large quantities of air at system start-up, Releases air pockets during system operation, Provides pipeline vacuum protection |
| trim materials | Stainless Steel 316 |
| seat design | Exclusive high/low pressure resilient seating |
| quality system | Manufactured under a certified ISO 9001 quality system |
| end connections | Inlets and outlets are equal to full nominal size |
Ordering & documentation
Documents
Ask for the documentation set with the inquiry — typical items (material certificates, test reports to the listed inspection standard, dimensional drawings) are confirmed and supplied with the quotation.
Quotation
Send the medium, temperature, pressure, size and connection for a quotation-ready inquiry. Lead time, MOQ and price are confirmed at quotation, together with the documents to be supplied with the order.
Sample & supply
Supply terms, order quantities and lead time are agreed per order — state the destination country and required schedule with the inquiry.
Storage & shipping
Store valves with seats and seals protected from UV, ozone and deformation, and keep end-face protectors on until installation; storage limits and shipping arrangements for the selected materials are confirmed at quotation.
Frequently asked questions
What sizes and pressure ratings are available for combination air release valves?
The published size range is 1" - 8". Availability of a specific size and rating is confirmed at quotation.
What materials are combination air release valves available in?
The published specification lists float material: T316 stainless steel. Material availability for a specific size and rating is confirmed at quotation.
What end connections do combination air release valves support?
The published specification lists Inlets and outlets are equal to full nominal size as the available end connections. The connection for a specific size is confirmed at quotation.
What should a quotation inquiry for combination air release valves include?
The governing standard and class, nominal size, body and seat materials, the service medium with temperature, and the destination — anything missing is confirmed during quotation.
Request a quote for combination air release valves
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Get a quotation for Combination Air Release Valves
Send the standard, pressure class and size for a quotation-ready inquiry — answered with documents and terms.