Gates

Products

  1. Clam Shell or Undercut Gate/Sector Gate
  2. Flap Gate/Diverter Gate (used within bifurcated chutes)
  3. Slide Gate or Rack & Pinion Gate
  • The entire range of Gates, offered by Synergy are engineered and supplied as per customers requirement
  • Product catalogue will assist the customer in selection of appropriate gate

Gate Slide or Rack and Pinion Gate

Gate operation:
The maximum force required to operate a slide gate occurs when opening from a fully closed position when material is resting on the gate blade. Once moving, the material weight on the gate is reduced, the required force is reduced proportionally as the gate opens.

Application note:
Actuator shall be selected by supplier as per data given by client/user

Gate Slide or Rack and Pinion Gate

Legend

A

Length of gate opening(also actuator travel)

B

Width of gate opening

'H1'

Effective height of material on the gate blade. See figure 1 and 2

W3

Gate weight

a

Acceleration factor

Fig.1

Material in a hopper will start to bridge or support itself a certain height 'H1' above the gate blade.

Fig.2

If the actual material above the gate blade is less, then use the actual height ‹ 'H1'

Clam Shell or Undercut Gate/Sector Gate

Gate operation:
The maximum force required to operate clamshell and undercut gate/sector gate occur when opening from a fully closed position when material is resting on the gate blade. Once moving, the material weight on the gate is reduced, the coefficient of friction is lower and the required force is reduced proportionally as the gate opens.

Application note:
Actuator shall be selected by supplier as per data given by client/user.

Clam Shell or Undercut Gate/Sector Gate

Legend

A

Length of gate opening

B

Width of gate opening

d

Effective length of lever arm. If specific dimension is not known, use length of gate 'A'/1.9)

H1

Effective height of material on the gate blade. See figures 1 and 2

R

Radius of gate. If specific dimension is not known use A/2 x 1.5

W3

Gate weight

Fig.1

Material in a hopper will start to bridge or support itself a certain height ‘H1’ above the gate blade. To find 'H1', use the 'h' factor from column height

Fig.2

If the actual material above the gate blade is less than the calculated value of 'H1', use the actual height.

Flap Gate/Diverter Gates (used within Bifurcated Chutes)

Gate operation:
A diverter gate will produce a torque at the gate shaft directed away from the vertical centre line.
To move the gate back toward the centre line a torque must be produced by the actuator through a lever arm that will exceed the gate torque.

Application note:
Actuator shall be selected by supplier as per data given by client/user,for both symmetric or non-symmetric gates

Flap Gate/Diverter Gates (used within Bifurcated Chutes)

Legend

A

Projected length of gate measured from vertical centre line

B

Projected height of gate measured from horizontal centre line

C

Width of gate

cg

Assumed centre of gravity of the gate

d

Effective lever arm length

G

Length of gate

Øo

Maximum angular travel of the gate from the vertical centre line

αo

Total angular travel