Our air release valves ensure maximum operational safety in liquid and vapor systems. They prevent air pockets, protect against negative pressure and reduce the risk of corrosion. Whether automatic air vents, pure air vents or vacuum breakers – you will find the right solution for your application here. We also offer automation solutions and heating jacket options for individual requirements.
Air release and vent valves automatically aerate and deaerate liquid systems. They are ideal for water, chemical and process systems and prevent air pockets and cavitation.
| Feature | Type 620 | EB 1.12 | EB 1.10 |
| Material | Steel/stainless steel | Stainless steel | Ductile iron/cast steel |
| Nominal pressure | PN 16 / PN 25 | PN 16 / PN 25 | PN 40 |
| Nominal size | DN 15 to DN 50 | DN 15 to DN 50 | DN 32 to DN 100 |
| Temperature | -10 to +200 °C | -10 to +200 °C | up to +200 °C |
| Special feature | Compact design | High corrosion resistance | For large air volumes |
Air vents are specially designed for removing air from liquid systems. They operate automatically and are ideal for heating, condensate and process applications.
| Feature | EA 12 | AE 30 | AE 36 | AE 50S |
| Material | Brass/plastic | Stainless steel | Stainless steel | Stainless steel |
| Nominal pressure | max. 6 bar | PN 10 | PN 10 | ANSI 300 |
| Nominal size | DN 15 to DN 250 | DN 15 to DN 250 | DN 10 to DN 400 | DN 10 to DN 200 |
| Connection | R 1/8-R 1/2 | Rp ½” | Rp ½” + R ¼” | Rp ¾” + Rp ½” |
| temperature | up to 110 °C | up to 100 °C | up to 100 °C | up to 427 °C |
| Special feature | With shut-off & leakage protection | Compact design | With check valve | For high pressure & high temperature |
Vacuum breakers protect systems from negative pressure, which can cause damage to pipelines and containers. They are indispensable in steam systems and heat exchangers.
| Property | VB 14 | VB 21 |
| Material | Brass/stainless steel | brass/stainless steel |
| Nominal pressure | PN 16 | PN 25 |
| Connection | Rp ½” | Rp ½” |
| temperature | up to 260 °C | up to 400 °C |
| Special feature | For standard applications | For high-temperature steam |
for all pressure and temperature ranges
and long service life
for aggressive media and special applications
In addition to our wide range of butterfly valves, we offer customized solutions for your processes in cooperation with Industriefabrik Schneider GmbH:
Your advantages: Shorter installation times, greater operational reliability, individual adaptation to your requirements
Air in liquid-filled lines forms air pockets, reduces the delivery rate and increases the risk of corrosion. Air release and vent valves remove this air automatically and allow air to flow back in during draining so that no vacuum forms – both without auxiliary power.
The most common design is the float-controlled air release valve: the float follows the liquid level and opens the valve as soon as air collects. Types AE 30 and AE 36 work fully automatically without manual intervention; the AE 50S is additionally designed to be maintenance-free. For large air volumes and for contaminated or foaming media, the EB 1.10 with stainless steel float and lever is suitable for continuous operation.
A soft-seated valve (AE 30/AE 36) closes particularly reliably under moderate operating conditions. Metal-seated versions such as the AE 50S are designed for extreme conditions: permissible up to 41.4 bar at 30 °C and up to 427 °C at 23.6 bar, minimum −40 °C, maximum differential pressure 30 bar. On the EB 1.10 the temperature determines the sealing principle: up to 130 °C the valve cone is soft-seated, up to 200 °C metal-seated.
The AE 36 is fitted with a check valve and only releases air. Where a line is drained, an air admission function or a separate vacuum breaker is required. The vacuum breakers VB 14 and VB 21 prevent a vacuum in pipes, heat exchangers and vessels and open at a differential pressure of just 6 mbar; available in PN 16 (up to 16 bar at 180 °C) and PN 25 (up to 25 bar at 120 °C) with Rp ½” female threaded connection.
| Type | Connection | Pressure | Temperature |
| Type 620 (Götze) | female thread G ½” to DIN EN ISO 228, DN 15; variant 620d with separate G 1″ air release connection | up to 6 bar | −30 to +120 °C |
| EA 122 (Honeywell) | R 1/8″ + 3/8″ or R 1/4″ + 3/8″, connection part in brass | max. 6 bar | max. 110 °C |
| AE 30 / AE 36 (Spirax Sarco) | inlet Rp ½”, outlet R ¼”; copper alloy or stainless steel, PN 10 | differential pressure max. 8 bar | max. 110 °C |
| AE 50S (Spirax Sarco) | inlet Rp ¾”, outlet Rp ½”; stainless steel, ANSI 300 | 41.4 bar at 30 °C | −40 to +427 °C |
| EB 1.12 (Mankenberg) | DN 25 to DN 100 or G 1″ to 2″, PN 16 | 0 – 16 bar | up to 130 °C |
| EB 1.10 (Mankenberg) | DN 32/15 to DN 100/50, PN 40; body in ductile iron for PN 16, cast steel for PN 25/40 | 0 – 40 bar | up to 200 °C |
| VB 14 / VB 21 (Spirax Sarco) | Rp ½” socket, Rp 1/8″ outlet bore; brass or stainless steel | PN 16 / PN 25 | up to 260 °C and 400 °C respectively |
Connection dimensions to DIN EN 1092, face-to-face lengths to DIN EN 558 and testing to DIN EN 12266. TA Luft and ISO 15848 are available on request.
Yes, for zone 1+21 and zone 2+22.
Depending on the manufacturer, yes. We then supply valve, actuator and control system as a pre-assembled and tested unit.
Yes. We manufacture the heating jacket individually in stainless steel and leak-test it before delivery.
Depending on type up to +450 °C.
