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Incineration - Double Flap Valves 
 

European Gate Valves has fitted double flap valves to a vacuum separator on a municipal incinerator restoring it to 'better than new'. 
 
Double flap valves have successfully replaced rotary valves on a vacuum separator. The initial installation included a set of rotary valves which after approximately three weeks became inoperable due to leakage past the rotary valve. Designed for the removal of environmental spillage from the waste processing areas, the vacuum equipment was required to pick-up ash and lime, together with various other powders and fines. 
 
Even after extended operation, the European Gate Valves double flap valve has demonstrated lower leakage rates than even newly installed rotary valves. Double flap valves provide a combination of performance, strength and durability, where conditions of abrasion, vacuum/pressure and temperatures up to 1000°C can be accommodated either singly or collectively. 
 
The European Gate Valves double flap valve successfully eliminates the continuous expensive process of maintenance/replacement/repair because sealing is achieved through the mating of two flat ground surfaces. 
 
Following the success of European Gate Valves double flap valve, it has now been specified at other Municipal Incinerator sites to replace rotary valves. 
 
 
Double flap valves are robustly manufactured to suit a wide range of application requirements: 
 
Valve Bodies can be made in: Cast Iron, Cast High Nickel Chrome and Cast Aluminium 
Fabricated bodies made in Carbon steel or Stainless Steels 
High chrome alloy seats and flaps provide long life even in the most aggressive applications 
 
Range of Applications: 
 
Temperatures to 1000°C 
Differential pressures to 102 Kpa where positive is below 
Abrasiveness - Some of the most abrasive materials are comfortably handled 
Lump Size - Depends on the valve opening size 
Opening to 600mm square 
 
Range of actuators: 
 
Linear Pneumatic Cylinders 
Rotary Pneumatic Cylinders 
Electric Motor with cams or push rods 
Gravity or Manual 
Hydraulic 
Features: 
 
Dual access covers 
Outboard Bearings 
Adjustable packed shaft seals as standard 
VDMA ISO standard cylinders 
Removable seat and flap with the valve in situ 
All metric standard components 
 
Wide range of optional equipment: 
 
PLC Control 
Flap position indication 
Heat shields 
Cooling for high temperature applications 
Purged high efficiency shaft seals 
Double Flap Valve
Double Flap Valve
Double Flap Valve
Double Flap Valve
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