DIAPHRAGMACTUATED VALVES

	DIAPHRAGM ACTUATED VALVES	RAF MODELS	RAF General Information
\| Description \| Applications \| Available Models \| Installation \| \| Typical Application \| Specification Form \| Animation \|	RAF 10 Float Level Control Valve

Description
RAF 10 is used to maintain a preset water level in reservoir or water tank in a simple manner. The RAF valve is activated by the line pressure.
The RAF 10 stays open as long as the water level in the reservoir is below a preset level. As the water level rises & floats the pilot's arm, the RAF gradually closes.

Applications
Use RAF 10 for reservoirs & water tanks level control anywhere. No need for energy other than line pressure. RAF 10 is best fit in remote sites. Due to it's simple design, it is virtually maintenance free.

Available Models
RAF 10 General application Float Level Control Hydraulic valve.
Pressure rating up to 16 bars.

Installation
RAF Float level control Valve is activated by line pressure & controlled by a two-way pilot valve. The pilot vent is opened or closed according to the float level. The float is located inside the reservoir as shown. The vertical float movements are amplified by a lever.

Automatic Operation:
When the water level is low, the lever drops due to the float weight, as illustrated. The vent is open. The control chamber of the RAF is drains through the open vent. The diaphragm of the RAF is forced upward by line pressure. The RAF is open.
As the float lever moves upward due to the rising water level inside the water tank, the vent closes mechanically. The RAF is then closed by the line pressure, forcing its diaphragm downwards.

Adjustment
Adjust the needle valve a to allow a sufficiently short closure time.
Preset the highest water level by fixing the pilot to the reservoir’s inner wall at the desired level.

RAF 10

Typical Application

RAF 10 Float Level Control Valve controls the water level of a water tank. The valve can also be located above the water level.

Specification Form

Float level Control

Configuration

Two way pilot

Model

RAF 10

Please Specify:

Minimum & maximum Flow rates.

Standard RAF 10	Special Features
Complete basic RAF valve as specified above	Enamel/epoxy coating
Self-cleaning screen filter	External heavy duty screen filter
Float arm assembly	-
Cock valve	-
needle valve	-
3/8" reinforced plastic tubes	-