Armfield Engineering Education
IRRIGATION WATER MANAGEMENT
FEX40-3-7 Gauging and Control Structures - Issue (Provisional)
In a surface irrigation distribution network it is first necessary to establish a command from which water may be discharged to the area where it will be applied to growing crops.
Regulation of discharge, its distribution and disposal is carried out using a range of control structures selected to suit particular situations. In order to familiarise technicians with the mode of operation of a variety of control structures, Armfield has designed and produced a range of demonstration units.
ORDERING SPECIFICATION
FEX40-3 SLUICE GATE
Adjustable Undershot Sluice Gate complete with user instruction sheet.
FEX40-4 SLUICE GATE
Adjustable Overshot Sluice Gate complete with user instruction sheet.
FEX40-5: FLOAT OPERATED RADIAL GATE
Float Operated Radial Gate complete with user instruction sheet.
FEX40-6: FLOAT OPERATED TILTING GATE
Float Operated Tilting Gate complete with user instructions and
experimental manual.
FEX40-7: FLOATING WEIR GATE
Floating weir gate complete with user instruction sheet.
Description
FEX40-3/4 SLUICE GATES
The two types of adjustable sluice gate, undershot and overshot, are widely used for the control of water in canal systems. In the absence of more accurate devices they may be used for the approximation of flow rates.
Armfield sluice gates are made from stainless steel and plastic and are designed to fit in a rectangular section channel 450mm wide.
Two types are available - undershot (FEX40-3) and overshot (FEX40-4).
FEX40-5/6/7 AUTOMATIC WATER CONTROL GATES
Automatic control gates are used extensively in canal systems for regulating water levels and discharge. They are usually float operated and are designed to maintain constant levels in the canal so that discharges from offtakes can be kept at a constant known rate. Armfield is able to supply models of three types of commonly used gate.
FEX40-5: FLOAT OPERATED RADIAL GATE
This is a counterbalanced radial-type gate which is controlled by means of a displacer located in a chamber. The displacer chamber is fed with upstream water via a vee notch weir and water is discharged from the chamber downstream through a circular orifice.
The flow through this orifice may be adjusted by means of a throttle valve, altering the characteristics of the gate as required. The gate, of the undershot type, provides upstream level control and is designed to fit in a rectangular channel section 450mm wide.
FEX40-6: FLOAT OPERATED TILTING GATE
This consists of a gate flap which is hinged at the base, The position of the gate is controlled by means of a displacer housed in a chamber. Water is fed to the chamber from the upstream side over a vee notch weir and discharged downstream through an orifice.
A throttle valve allows the orifice flow to be controlled and the gate characteristics to be modified as required. The gate, of the overshot type, provides a further method of control of upstream level and is designed to fit in a rectangular channel section 450mm wide. This is a radial-type gate incorporating bouyancy tanks.
The gate floats at a constant depth so the head of water over the gate crest therefore the flow, remains constant despite variations in upstream level. The gate is suitable for applications where constant flow is required, for example in irrigation canal offtakes and is designed to fit in a rectangular channel section 450mm wide.
FEX40-7: FLOATING WEIR GATE
This is a radial-type gate incorporating bouyancy tanks. The gate floats at a constant depth so the head of water over the gate crest therefore the flow, remains constant despite variations in upstream level. The gate is suitable for applications where constant flow is required, for example in irrigation canal offtakes and is designed to fit in a rectangular channel section 450mm wide.
Shipping specification
FEX40-3 SLUICE GATE
Volume: 0.1m3
Gross weight: 20kg
FEX40-4 SLUICE GATE
Volume: 0.1m3
Gross weight: 20kg
FEX40-5: FLOAT OPERATED RADIAL GATE
Volume: 0.3m3
Gross weight: 70kg
FEX40-6: FLOAT OPERATED TILTING GATE
Volume: 0.3m3
Gross weight: 70kg
FEX40-7: FLOATING WEIR GATE
Volume: 0.3m3
Gross weight: 70kg
Overall dimensions
FEX40-3 SLUICE GATE
580mm x 585mm x 80mm
(width 450mm)
FEX40-4 SLUICE GATE
580mm x 585mm x 80mm
(width 450mm)
FEX40-5: FLOAT OPERATED RADIAL GATE
Height: 475mm
Length: 715mm
FEX40-6: FLOAT OPERATED TILTING GATE
Height: 445mm
Length: 470mm
Width: 480mm
FEX40-7: FLOATING WEIR GATE
Height: 360mm
Length: 500mm
Width: 480mm
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