KARA - Anti-Shock Combination Air Release Valve

Name: KARA - Anti-Shock Combination Air Release Valve
Brand: Euro Flow Control
SKU: EFC-337

Datasheet

Download datasheet (PDF)

Specifications are indicative. Final specification is confirmed at quotation.

Specifications

Confirmed at quote

Size Range: DN50 to DN300
Pressure Class: PN10, PN16, PN25
End connection: Flanged
Operating temperature: -10°C to 80°C

Standards

Design & manufacture: BS EN 1074-4, AWWA C512, BS EN 1092
Face to face: BS EN 558

Configure your variant(manually adjust box on the right if you require a different spec)

Size
Pressure
End connection

Materials

All available material options per part. Click a pill to set it in the configurator.

Body
Bonnet
Seat
Spring
Anti Shock Device
Buffer
Cover
Fasteners
Float
Guide Barrel
Nozzle Seat
Pillar
Plug
Screen
Sealing Arc
Seals
Small Nozzle

Pressure-temperature rating

Maximum working pressure at each temperature, per pressure class.

Class	Pressure	Min temp	Max temp
PN25 (flanged, DN50-DN300)	25 bar	-10°C	80°C

Dimensions per size(11 sizes)

Size	B (mm)	D (mm)	K (mm)	H (mm)	N-d (mm)	C (mm)	Max water flow rate (m3/h) (m3/h)	Bore of outlet (mm)	Small orifice size (mm)	Weight
DN50	99	165	125	310	4-Ø19	19	1360	75	2	—
DN80	132	200	160	382	8-Ø19	19	4160	95	3	—
DN100 PN16	156	220	180	420	8-Ø19	19	8500	130	3.5	—
DN100 PN25	156	235	190	420	8-Ø23	19	8500	130	3.5	—
DN150 PN16	211	285	240	520	8-Ø23	19	19100	170	4	—
DN150 PN25	211	300	250	520	8-Ø28	20	19100	170	4	—
DN200 PN10	266	340	295	630	8-Ø23	20	33400	230	5.5	—
DN200 PN16	274	360	310	630	12-Ø23	22	33400	230	5.5	—
DN200 PN25	274	360	310	630	12-Ø28	22	33400	230	5.5	—
DN300 PN16	370	460	410	800	12-Ø23	24.5	76300	330	6	—
DN300 PN25	370	460	410	800	12-Ø28	24.5	76300	330	6	—

* Max water flow rate is the KARA quick-selection guide figure for the recommended main pipe size range (source: AFC KARA datasheet, Quick Selection Table). Flange type DN50-DN300 can be up to Max. WP PN25 per source.

Quick selection

Inlet size	Max. water flow (m³/h)	Main pipe size (mm)	Outlet bore (mm)	Small orifice (mm)
DN50	1360	200-400	75	2
DN80	4160	400-700	95	3
DN100	8500	750-1000	130	3.5
DN150	19100	1050-1500	170	4
DN200	33400	1500-2000	230	5.5
DN300	76300	2100-3000	330	6

Ordering code

KARA-[size]-[rating] (e.g. KARA-0200-16)

KAR = kinetic air valve with 3 functions

A = Anti shock device

0080 = DN800200 = DN200

10 = PN1016 = PN1625 = PN25

Technical drawings(2 pages)

Operating media

Clean water

Typical applications

Potable water distribution
Water treatment
Pump stations

Coatings

Fusion bonded epoxy

Approvals

WRASISO 9001

Features

Advanced design with simple mechanism, strong float to prevent cracking during sudden water hammer and quick closure
Aerokinetic mechanism to resist blow shut under higher air velocity, even up to sonic velocity of air
Anti shock device installed on top of bonnet: slows the exhausting air flow during filling to prevent hammer impact; drops down under vacuum to let large air into the pipeline
No arms or levers, preventing vibrating, bending or direct closure of the float
Smooth barrel outside the float keeps it moving in a specified guide rail
Guide barrel buffer for collision prevention, with drain holes around the barrel for easy drainage during vacuum
Outside screen available as an option for safety and to prevent insects or birds entering
Fully fusion epoxy coated inside and outside of the valve body for long term service
Manufacturing standard meets or exceeds BS EN 1074-4 and AWWA C512
Flange drilling and dimensions meet BS EN 1092 and BS EN 558 and ANSI flange

Description

The KARA combination air release valve combines large-orifice kinetic air venting during filling with small-orifice continuous air release under operating pressure. The anti-shock check mechanism prevents water hammer caused by rapid air column collapse. Suitable for potable water transmission mains and distribution systems where surge protection is required alongside air management.

Selection notes

This air release valve is supplied for flanged installation.

Sizes run DN50 to DN300, in PN10, PN16, PN25.

The body is Ductile Iron EN GJS 500-7.

Seat and trim options are EPDM. The seat, not the body, usually sets the temperature and medium limit, so confirm it against the service before ordering.

Stated service media include clean water.

It is catalogued for Water & Wastewater.

Working temperature is -10°C to 80°C.

Built to BS EN 1074-4, AWWA C512, BS EN 1092 and BS EN 558.

Supplier remarks

Flow performance and air-venting capacity charts are stated in the source datasheet (pressure-differential vs in/out flow per DN; working pressure vs air venting capacity per orifice size) but are curves, not tabulated points, so not reproduced here beyond the quick-selection figures above.