What is the difference between AE30, AE30A, AE30B, and AE30C variants?

The AE30 is the standard air eliminator. AE30A adds a check valve to prevent backflow. AE30B includes a lockshield valve for isolation. AE30C combines both check valve and lockshield features for maximum control and safety.

Can the AE30 be installed horizontally?

No. The AE30 must be installed vertically with the inlet at the bottom for proper float operation. The discharge should be piped to a suitable drain point.

What is the purpose of the lockshield valve?

The lockshield valve allows the air eliminator to be isolated for maintenance without draining the system. Its 3-way locking mechanism prevents unauthorized tampering while permitting normal operation when required.

Is the AE30 suitable for glycol-based systems?

Yes, the AE30 is compatible with glycol mixtures commonly used in chilled water and heating systems, provided the minimum specific gravity of 0.926 is maintained for proper float operation.

What spare parts are available for the AE30 series?

A maintenance kit is available comprising the cap O-ring, float, valve cone, check valve ball, and circlip. This covers all serviceable components for routine maintenance.

SPIRAX SARCO · AIR VENTS & ELIMINATORS

Spirax Sarco AE30 Automatic Air Eliminator – Air & Gas Vent for Liquid Systems

Name: Spirax Sarco AE30 Automatic Air Eliminator – Air & Gas Vent for Liquid Systems
Brand: Spirax Sarco

Spirax Sarco AE30 automatic air eliminator for liquid systems. DZR brass, PN10, 110°C. Ideal for HVAC & process plants. Buy from PC Engineering India.

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Overview

The Spirax Sarco AE30 series is a range of automatic air eliminators designed for continuous venting of air and gases from liquid systems. These units are essential for maintaining system efficiency by preventing air pockets that can cause corrosion, noise, pump cavitation, and reduced heat transfer in closed-loop circuits.

The AE30 features a dezincification-resistant (DZR) brass body and cap, making it suitable for aggressive water conditions commonly found in industrial and HVAC applications. The float-operated mechanism provides reliable, maintenance-free air release without manual intervention.

Four variants are available to suit different installation requirements: the standard AE30, the AE30A with integrated check valve, the AE30B with lockshield valve, and the AE30C combining both check valve and lockshield features. The lockshield valve includes a unique 3-way locking system that can be locked open, locked closed, or operated as a conventional ball valve.

Key Features

Dezincification-resistant (DZR) brass construction for corrosion resistance
Float-operated automatic air release mechanism
Available with integrated check valve (AE30A, AE30C)
Lockshield valve option with 3-way locking system (AE30B, AE30C)
Compliant with European Pressure Equipment Directive
Compact design for easy installation in confined spaces
Suitable for vertical installation with bottom inlet
Viton and EPDM sealing options for chemical compatibility

Specifications

Parameter	Value
Body Design Conditions	PN10
Maximum Allowable Pressure (PMA)	10 bar g @ 120°C
Maximum Allowable Temperature (TMA)	120°C @ 10 bar g
Maximum Operating Pressure (PMO)	10 bar g @ 110°C
Maximum Operating Temperature (TMO)	110°C
Maximum Differential Pressure (DPMX)	8 bar g @ 110°C
Operating Temperature Range	0°C to 110°C
Minimum Specific Gravity	0.926
Inlet Connection (AE30, AE30A)	½" female BSP or NPT
Inlet Connection (AE30B, AE30C)	½" male BSP
Outlet Connection	¼" male BSP or NPT
Body Material	DZR brass alloy BS 2872 CZ 132
Float Material	Acetal co-polymer / Stainless steel
Valve Cone	EPDM or Viton
Weight (AE30, AE30A)	0.7 kg
Weight (AE30B, AE30C)	0.9 kg
Dimensions (A × B × C)	56 × 105 × 10 mm

Applications

- HVAC heating and chilled water circuits - Closed-loop cooling systems in manufacturing plants - Boiler feed water systems - Process liquid pipelines in chemical and pharmaceutical industries - District heating networks - Solar thermal installations - Water treatment plants - Fire protection systems

Frequently Asked Questions

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