Keraflo Aylesbury ‘KS’ Type Float Valve (Delayed Action) WRAS Approved Valves

Product Overview

Keraflo Aylesbury ‘KS’ Type float valves are delayed action type valves (made from stainless steel), WRAS approved, suitable for use in cold water tanks without raised valve chambers.

Keraflo ‘KS’ type valve does not immediately open when water is taken from the tank and the water level falls. Instead, there is a delay and the valve does not open until the water level has fallen by 75mm.

When this occurs, the ‘KS’ type float valve moves from a fully ‘closed’ position to a fully ‘open’ position allowing the water to flow in a return to the tank to its original fill level.

Keraflo Aylesbury ‘KS’ Type Float Valve – Product Benefits

Aylesbury KS float valve’s weighted float can be adjusted to a number of positions on the brass float arm, allowing the tank’s stored water level to be easily modified.

Keraflo float valves are available in stainless steel for use in demanding environments such as desalination plants and sea water.

The positive action and full bore flow delivered by the ‘KS’ type float valve provides further benefits such as good water turnover fast refill, the eradication of water hammer and reduced noise.

Keraflo ‘KS Type’ Float Valve – Pre-Installation Checks

When installing the Keraflo Aylesbury ‘KS’ Type Float Valves, there are a number of pre-installation checks and instructions that must be carried out and followed in order for the valve to operate effectively.

The range of pre-installation checks that should always be carried out are:

Raised Valve Chambers – The Keraflo Aylesbury KS type valve should not be used with raised valve chambers. Instead Keraflo KAX or KB float valve should be installed.

Operating Space – There should always be sufficient clearance in the area the valve is to be installed within and the working dimensions are shown on the drawings available in the installation instructions.

Overflow/Warning Pipes – The position of the overflow pipe should always be checked and within the product drawings this will be labelled as ‘R Max’.

Turbulent Water – In applications with exceptionally turbulent waters such as cooling towers the float should not be placed directly above. Calming measures such as baffle plates or still ponds should be used in these applications.

Flanged Tanks – The design of the KS type float valve allows sufficient clearance between the float and most internal tank flanges and ribs. The valve backnuts can be adjusted to enable the valve to be fitted to tanks with large flanges if a 20mm gap exists between the float and tank wall throughout the arc of the float.

Round Tanks – The minimum diameters required for use of the valve in round tanks are:

Sloping Tank Wall – The wall to which the KS type float valve is to be installed on must be vertical and if the wall is sloped then tapered washers must be used.

Pipework Support – The range of Keraflo float valves create virtually no tank wall stress. It is not necessary to to provide additional support to the pipework as long as the Code of Practice for the Support of Pipework in general is met.

Float Valves Selector

Contact our team with the following information to enable the correct specification of Keraflo float valves :

• State the application (e.g break tank, gravity tank, rainwater tank, sprinkler tank etc)
• What is the float valve flow rate required?
• What is the line size (supply pipe bore)?
• What is the water supply?
• Depth of tank (from supply inlet to tank floor)?
• Does the tank have a raised valve chamber?
• Do you have a requirement for monitoring and control? (e,g level and temperature monitoring, alarms etc)?