Combination Air Release Valve

Combination Air Release Valve is designed to automatically release accumulated air and admit large volumes of air during pipeline filling or draining.

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Product Introduction

Product Overview

Combination Air Release Valve is designed to automatically release accumulated air and admit large volumes of air during pipeline filling or draining. It is commonly used in water transmission and sewage systems to maintain hydraulic efficiency, reduce pressure fluctuations, and protect pipelines from air-related operational issues.

Technical Specifications

Item	Specification
Product Name	Combination Air Release Valve
Available Size Range	DN50–DN150
Pressure Rating	PN10 / PN16 / PN25
Connection Type	Flanged
Working Medium	Water / Sewage / Neutral Fluids
Working Temperature	0°C–80°C (standard)
Installation Position	Vertical
Applicable Standards	EN, ISO, DIN, ANSI, BS (optional)

Material Details

Component	Material
Valve Body	QT450 Ductile Iron
Valve Cover	QT450 Ductile Iron
Float	Stainless Steel
Strainer	Stainless Steel
Seal Ring	EPDM / NBR
Bolts & Nuts	Carbon Steel / Stainless Steel
Internal Components	Stainless Steel

Quality Assurance

Raw material inspection including chemical composition verification and mechanical property testing.

Dimensional inspection according to approved production drawings and applicable standards.

Pressure shell test to verify body integrity under specified pressure conditions.

Seat sealing test for leakage performance verification.

Functional operation test for air release and air intake performance.

Coating thickness inspection for corrosion protection consistency.

Traceability control covering production batch and inspection records.

Available certifications: ISO 9001, CE, EN 1074 compliance (optional according to project requirements).

Customization Options

Option	Available Choices
Logo Marking	Laser marking / Casting logo / Nameplate
Packaging	Carton / Plywood case / Export pallet
Flange Standard	DIN / ANSI / BS / JIS / EN
Material Upgrade	Stainless Steel / Higher-grade ductile iron components
Internal Parts Material	SS304 / SS316
Coating	Fusion bonded epoxy / Customized anti-corrosion coating
Color	Blue / Red / Black / Customized RAL color
Pressure Class	PN10 / PN16 / PN25
Seal Material	EPDM / NBR
Size Range	Customized within production capability

FAQ

Q: Can the valve be used in wastewater systems?

A: Yes. Models equipped with stainless steel strainers and suitable sealing materials are commonly used in sewage applications.

Q: Do you support OEM or private label production?

A: OEM services are available, including logo marking, customized packaging, and product identification.

Q: What is the typical production lead time?

A: Lead time typically ranges from 15–35 days depending on quantity, specifications, and customization requirements.

Q: What installation practices are recommended?

A: The valve should be installed vertically at high points in the pipeline where air accumulation is expected.

Q: How should maintenance be performed?

A: Periodic inspection of the float mechanism, seals, and strainer is recommended based on operating conditions and medium cleanliness.

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