Aylesbury Type KB Fully Variable Delayed Action Float Valve · valve to open or close. The...

Aylesbury Type KB Fully Variable Delayed Action Float Valve

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Suitable for tanks with or without raised valve chambers. The valve is operated by a transfer of weight in an actuator tube which causes the valve to open or close. The arrangement of the float and buoy assembly produces a delayed change of balance in the actuator as the water level alters. Aylesbury 'KB' Type valves have a variable delayed action and feature a chain in place of a rigid float arm enabling virtually unlimited opening and closing levels. This allows for a considerable drop from the valve to the water level, overcoming issues associated with drop arms.

SPECIFICATION

Sizes Available: 3/4” (20mm) to 2” (50mm) - larger on request Water Pressure: Suitable for 0-10 bar Temperature Range: 1-60°C Fully variable opening and closing operating differential of up to 1820mm and longer on request. Opposite handle available on request.

FEAUTRES & BENEFITS

• Maintenance Free: Designed to operate for long periods without maintenance.

• Extended Durability: Non-wearing ceramic disc seal in a DZR brass housing.

• Revolutionary Shaped Puncture Proof Float: Made from Polyethylene closed cell foam which is CFC free air retardant and chemically and biologically inert. This radical design virtually eliminates stress on the tank wall fixing point.

• Backsiphonage Protection: “Up and Over discharge” to BS1212 part 2 helps to facilitate Air Gap compliance.

• Virtually Indestructible: The heart of the valve incorporates pressure compensated rotating ceramic discs which are aligned in the open position.

• Ideal for pumped systems

• Reduces Legionellae risk

• No valve bounce

• No dribble

• No water hammer

• Improves water turnover

• Saves energy with positive pump control

• Maximises tank capacity

• Fixed & variable level differential models

• Full flow during fill

VIP Product Code 16/0085

Dimensions (mm)

Stock Code JMIN JMAX K LMAX M NMIN NMAX O

16/0085/020 175 1800 168 200 26° 160 180 70

16/0085/025 175 1800 168 200 26° 160 180 70

16/0085/032 175 1800 168 200 26° 160 180 70

16/0085/040 175 1800 168 200 26° 160 180 70

16/0085/050 210 1670 210 237 34° 180 220 115

PMIN PMAX Q RMIN

200 1825 65 375

200 1825 65 375

200 1825 65 375

200 1825 65 375

330 1815 120 540

Size

3/4”

1”

1 1/4”

1 1/2”

2”

RMAX SMAX T UMIN ØV WMIN XMAX YMIN

2000 215 26° 160 130 170 245 500

2000 215 26° 160 130 170 245 500

2000 215 26° 160 130 170 245 500

2000 215 26° 160 130 170 245 500

2000 268 34° 180 170 320 305 800

NOTES

ⓐ Longer chain available on request. ⓑ Opposite hand valves available as cost option (chain on left). ⓒ SCHD 2, SECT 7, G16.5 Water Regs. Gap should be more if water is turbulent, especially if near valve discharge. 40mm minimum for valves 1 1/2” (DN 40) or larger. ⓓ Typically twice inlet bore. SCHD 2, SECT 7, G16.10 Water Regs - warning / overflow pipe(s) should be capable of taking any possible flow in the pipe arising from inlet valve failure. ⓔ When opening level = RMIN.

Dimensions (mm)

Stock Code Size A BMAX C ØD ØE ØF GMIN H

16/0085/020 3/4” 313 44 34 19 26.5 130 92 85

16/0085/025 1” 313 44 34 26 33 130 92 85

16/0085/032 1 1/4” 282 55 52 34 42 130 74 112

16/0085/040 1 1/2” 282 55 52 34 47.5 130 74 112

16/0085/050 2” 320 92 44 35 60 170 55 112

DIMENSIONS - SIDE VIEW

BASIC SPECIFICATION

Maximum Static Pressure: 10 Bar

Maximum Flow Rate: 3m/s nominal pipe velocity

Temperature Range: 1-60°C

Parallel male BSP (G) connection. NOTES

ⓐ 45° discharge available as cost option (further reduces stagnation).

ⓑ Long tail option on 1 1/2” SF (DN 40) and 1 1/2” HF (DN 40). Increases A & G by 45mm and B by 30mm.

ⓒ Suitable for spigot and fibre washer fittings on 3/4” and 1” valves.