Continuous air venting and vacuum protection for water mains and pumping systems.
Engineered around the medium, pressure, temperature and operating duty.
Product overview
Automatic air valve for releasing accumulated air during operation and admitting air during pipeline draining or negative-pressure conditions.
Greysen reviews the complete operating case before confirming the valve. Body style, wetted materials, sealing system, connection standard and operator are matched as one project configuration.
Typical technical specification
Nominal sizeDN15–DN300 (½–12 in)
Pressure ratingPN10 / PN16 / PN25 configurations
Body materialsCast iron or ductile iron with protective coating
Disc / trimStainless steel float and internal mechanism
Seat / sealingEPDM, NBR or compatible elastomer
End connectionThreaded or flanged
Design & testingEN 1074-4; AWWA C512 options; EN 12266-1 testing
Typical mediaRaw water, potable water, wastewater and irrigation water
DESIGN DETAILS
Features and benefits
01
Valve construction
Combination designs handle large air volumes during filling and draining.
02
Sealing performance
Automatic small-orifice release removes pressurized air pockets.
03
Reliable operation
Float mechanism closes the outlet when liquid reaches the valve.
04
Project flexibility
Isolation and anti-surge options suit critical locations.
CONFIGURATION OPTIONS
Materials and sealing selection
Material combinations are reviewed against corrosion, erosion, temperature and required service life. The final approved data sheet defines every pressure-containing and wetted component.
Body
Cast iron or ductile iron with protective coating
Trim
Stainless steel float and internal mechanism
Seat & seals
EPDM, NBR or compatible elastomer
Connection
Threaded or flanged
VALVE + OPERATOR
Operation and automation
Manual and automated packages are selected using the valve operating load, maximum differential pressure, required speed and available site utilities.
Manual operation
Lever, handwheel or gearbox options are matched to size, torque and access.
Pneumatic actuation
Double-acting or spring-return packages can include solenoid, switch box and positioner.
Electric actuation
On/off or modulating actuators are configured for voltage, duty, enclosure and control signal.
Package verification
Torque or thrust, safety factor, mounting interface, travel time and fail position are checked together.
APPLICATION REVIEW
Information for correct selection
Nominal size, pressure class and mating connection standard.
Medium, concentration, solids and minimum/maximum temperature.
Normal and maximum differential pressure, flow rate and cycle frequency.
Manual or actuated operation, fail position, control signal and required travel time.
Typical applications
Transmission mains
Pumping stations
Wastewater force mains
Irrigation networks
Engineering checks
Pressure-temperature suitability
Material and media compatibility
Flow velocity and operating load
Installation orientation and maintenance access
PROJECT SUPPORT
Technical documentation
Request the documents required for consultant review, procurement and site handover. Availability is confirmed for the selected product and order.
Product data sheet
General arrangement drawing
Installation and maintenance guidance
Test and material documents when specified
Configuration note: Published ranges describe common industry configurations. Final dimensions, pressure-temperature limits, materials, certifications and standards are confirmed against the enquiry and approved data sheet.