API · ASME · DIN · EN standard industrial valves
Single Orifice Air Valves
Single orifice air valves vent accumulated air from liquid lines through one small orifice: a stainless float drops as air gathers in the chamber, opening the seat to release the pocket, then rises with the returning fluid to close. The range covers body, bucket, covers and bonnet in cast iron, ductile iron or stainless steel with a stainless float, stem, yoke and plug, NBR or EPDM gasket, DN40 to DN200 at Class 150 to Class 300 or PN16 to PN40, built to DIN 3352 with DIN 2501 flanges and BS 6755 testing. Selection turns on line size against the DN band, working pressure class, and the small-orifice duty of releasing air pockets during filling and operation rather than handling large bulk air or surge.
Part of the Air Release Valves family
Last updated: 2026-11
Family specifications
| body materials | Cast iron, Ductile Iron, Stainless Steel |
|---|---|
| bucket materials | Cast iron, Ductile Iron, Stainless Steel |
| float ball materials | Stainless Steel |
| gasket materials | NBR, EPDM |
| cap materials | Cast iron, Ductile Iron |
| stem materials | Stainless Steel |
| stem yoke materials | Stainless Steel |
| plug materials | Stainless Steel |
| size range | DN40 to DN200 |
| pressure class | Class150 to Class300, PN16 to PN40 |
| design standards | DIN3352 |
| flange standards | DIN2501 |
| testing standards | BS6755 |
| mAv inside cover materials | Cast iron, Ductile Iron, Stainless Steel |
| mAv bolt materials | Carbon Steel, Stainless Steel |
| mAv outside cover materials | Cast iron, Ductile Iron, Stainless Steel |
| mAv top plug materials | NBR+Stainless Steel |
| mAv plug sleeve materials | Stainless Steel |
| nAv body materials | Ductile Iron |
| nAv connection type | Flanged |
| nAv pressure rating | PN10 · PN16 |
| nAv size range | DN40/50/60/65 |
| nAv epoxy coating | >250 μm |
| nAv coating color | RAL5015 |
| tAv body material | Ductile iron GGG50 |
| tAv size range | DN40-DN300mm |
| tAv design standards | BS, DIN, EN |
| tAv standard compliance | DIN 3352b |
| tAv working pressure | 16Kg/cm2 |
| tAv shell test pressure | 24Kg/cm2 |
| tAv seat test pressure | 18Kg/cm2 |
| tAv media | Water |
| tAv coating | 100% fusion-bonded epoxy |
| tAv flange drilling | BS4504 table 10/11, 16/11; EN1092 PN10, PN16 |
| gasket | NBR, EPDM |
| inside cover | Cast iron, Ductile Iron, Stainless Steel |
| inside bolts | Carbon Steel, Stainless Steel |
| outside cover | Cast iron, Ductile Iron, Stainless Steel |
| outside bolts | Carbon Steel, Stainless Steel |
| stem yoke | Stainless Steel |
| top plug | NBR+Stainless Steel |
| plug sleeve | Stainless Steel |
| flanged end dimension | DIN2501 |
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 standards govern the design and testing of single orifice air valves?
The published specification for this family lists DIN3352 as the design standards. Testing follows BS6755.
What sizes and pressure ratings are available for single orifice air valves?
The published size range is DN40 to DN200, and the published pressure ratings are Class150 to Class300, PN16 to PN40. Availability of a specific size and rating is confirmed at quotation.
What materials are single orifice air valves available in?
The published specification lists body materials: Cast iron, Ductile Iron, Stainless Steel. Material availability for a specific size and rating is confirmed at quotation.
What should a quotation inquiry for single orifice air 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.
Models & executions in this subtype
Model
Screwed Single Release Air Valves
The screwed single release air valve is the threaded-connection, single-orifice execution of the air release family: a stainless steel float drops as accumulate
View specifications →Model
Flanged Single Orifice Air Valves
Flanged single orifice air valves are the flanged-body execution of the single-orifice principle: one float-controlled orifice releases entrained air from a pre
View specifications →Request a quote for single orifice air valves
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Get a quotation for Single Orifice Air Valves
Send the standard, pressure class and size for a quotation-ready inquiry — answered with documents and terms.