直通管线双闸板阀

Design features

Flat or round body valve design
Mounting options: flanges or welding ends
With reduced or full-bore passage
One-piece valve body with cleaning cover and connections for purge medium
Smooth tubular passage in the open position (valve body free of solid particles)
Can be installed in any orientation
Designed to customer specifications and German or international standards
Accommodates any desired type of actuator
Materials selected to suit operating conditions
Operating temperature up to 700 °C, without cooling or refractory lining
Nominal diameters up to DN 1400 mm
Specially developed technique for crackfree hard-surfacing of the seats of even large diameter valves ensures long-term maintenance-free service

3-year warranty period (maintenance-free) for installation in ethylene units
Low wearing (even when frequently actuated) due to hardsurfaced seats
Double Block & Purge Design
Body internal space tight against solid particles when in open position due to expansion bellow device with double sealing
During valve operation the internal body space remains free of particles because of installed guide plates
Perfect actuation and tightness even under extreme operating conditions
Suitable for media with extremely high solid-particle content
No jamming even under extreme temperature changes
No jamming due to forces and moments resulting out of the piping system (calculation by finite element analysis during valve layout) incorporates such forces and moments
Force release of the discs prior to opening the valve (minimized wear)
Central sealing force due to ball-wedge mechanism
Seats continuously covered in the end position, thus preventing deposit build-up on the seat surfaces

Main transfer and decoking lines of ethylene units
Fluidized catalytic cracking units (in overhead vapor and fractionator bottom lines)
Coal gasification units
Visbreaker units
Epichlorhydrin units