Aylesbury Type K Delayed Action Float Valve

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Suitable for tanks without raised valve chambers. The weighted key-shaped float which is supplied with Aylesbury ‘K’ Type float valves can be accurately set in a number of positions on the brass float arm, actuating the valve at a predetermined difference in water level, driving it fully open or fully closed without water hammer. This positive action avoids dribble, reduces noise and allows full flow until the selected closed level is reached. Inherent in the design is a non-adjustable operating differential in water level between opening and closing of approximately 75mm. Also available in stainless steel for use in demanding environments such as desalination plants and sea water.

SPECIFICATION

Sizes Available: 3/4” (20mm) to 2” (50mm) - larger on request Water Pressure: Suitable for 0-10 bar Temperature Range: 1-60°C Open / Close Differential: 75mm (approx, non-adjustable)

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

16/0083

Dimensions (mm)

Stock Code Size J K L M N O P Q RMAX SMAX T

16/0083/020 3/4” 340 70 155 225 30 470 210 315 185 160 41°

16/0083/025 1” 340 70 155 225 30 470 210 315 185 160 41°

16/0083/032 1 1/4” 340 70 155 225 30 470 210 315 185 160 41°

16/0083/040 1 1/2” 370 70 155 255 60 510 250 340 225 200 41°

16/0083/050 2” 390 80 155 270 25 510 250 340 225 200 40°

DIMENSIONS - FRONT VIEW

Highest Water Level Setting:

Lowest Water Level Setting:

WARNING

The float arm must be fitted absolutely vertical (in the open position) as indicated by the spirit level.

Misalignment will prevent the valve from closing (see diagram to the right).

Ensure overflowing level is not lower than shown below (RMAX) and higher for higher water levels.

Level differential 50 - 100mm non-adjustable delayed action.

NOTES

ⓐ 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” (40mm) or larger.

ⓑ Typically twice inlet bore. SCHD 2, SECT 7, G16.10 Water Regs - warning / overflow pipes should be capable of taking any possible flow in the pipe arising from inlet valve failure.

ⓒ If longer drop required please call us on the contact details below.

Dimensions (mm)

Stock Code Size A BMAX C ØD ØE F GMIN H

16/0083/020 3/4” 333 44 34 19 26.5 125 100 85

16/0083/025 1” 333 44 34 26 33 125 100 85

16/0083/032 1 1/4” 340 55 73 35 41.5 125 104 112

16/0083/040 1 1/2” 340 55 73 35 47.5 125 104 112

16/0083/050 2” 390 90 73 35 60 200 85 112

DIMENSIONS - SIDE VIEW

BASIC SPECIFICATION

Maximum Static Pressure: 10 Bar

Maximum Flow Rate: 3m/s nominal pipe velocity

Temperature Range: 1-60°C

Level Differential: 125-166mm non-adjustable delayed action.

Parallel male BSP (G) connection. NOTES

ⓐ 15° discharge standard on 1/4” to 2” SF (DN 32 to 50). 45° cost option available (further reduces stagnation).

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

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