VARIVENT® Valves - The core component for matrix-piped process plants
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VARIVENT > Valves > The core component for matrix-piped process plants Process Equipment GEA Tuchenhagen size="-1">

. . . are operationally reliable, easy to maintain,CIP/SIP-capable that altogether are essential factors for continuous product quality. Low operational maintenance and service costs ensure economical plant productivity. The VARIVENT > ή system is built up in a modularstructure and therefore offers high application flexibility, efficiency for the plant user, optimised stock inventory and favourably-priced spare parts and low parts diversity. Many valve types are EHEDG certified and meet 3A standard. VARIVENT > valves are characterised by their special sealing technique. The metallic stop of...

double seal valves type C . . . VARIVENT > ή mixproof valves type D . . .VARIVENT > . . . are used for mixproofseparation of incompatible media at flow path intersec-tions. In the closed positionof the valve (non-actuated position) always two seals are located between the twopipes. If one of the seals fails, leakage may directlydrain to the open via the therefore provided leakageoutlet of the valve without intermixing with the productbeing in the second pipe. . . . have a one-part valvedisk with a double seal.They are used for mixproof separation of incompatiblemedia at flow path...

VARIVENT > mixproof valves type K . . . VARIVENT > ή mixproof shuttle valves type Y . . . > . . . are used for mixproofshut-off at flow path inter- sections of two pipe systems.These valve have no devicefor cleaning the isolation chamber. They are mainly used as cleaning and gas val-ves in CIPsystems and gas blocks. . . . are based on the VARIVENT . . . are used for divertingliquids in a pipe system, i.e.from one pipe on to twopipes, with mixproof separa- tion between the central andthe upper pipe. In the closed position of the valve (non-actuated posi- tion) always two seals arelocated...

In the closed position the upper and thelower valve housings are each sealed by an independent valve diskTo open, the actuated lower valve disk(blue colour) is raised. The throttling gapbetween the lower valve disk and theseat ring minimises the switching leakage that is drained pressureless to the open through the valve stem. Afterwards, the isolation chamber between the upper double disk (green) and the lower valve disk is shut-off. The upper double disk is entrained bythe actuated lower valve disk into thevalves open position. The valve is now opened. In the closed position the upper and...

16 .Aseparate connection isused to supply the isola-tion with cleaning media. 17 .The isolation chamber iscleaned via a radiallyacting spraying nozzle inthe upper valve disk. > 1.Amply sized multi-colouroptical indication hoodon the top of the T.VIS 3 > control module clearlyindicates and visible fromall sides the valveΒs current status. 2.Splash-water proof con-trol module, connected tothe actuator with clamps is provided for the pro-tection of electronics.3.Interactive feedback viathe integrated stroke travel measurement.4.The whole control module can be removed for maintenance...

Mixproof Valve Type D in closed position 16 axial/radial sealing axial/axial sealing 8 9 11 17 14 15 Diffusion of stress in the seal. The sealinggeometry was optimised by calculationsbased on the FEM method. Constant compression seal, see 14. 7 >

No Mixproof Yes Yes Sterile products No No Product Yes Resistant to pressurehammers Yes No Yes Tank outlet No Compact design Tank outlet Yes No Yes No No Two valve disks Yes STERICOM > ή ή ή ή ή V Valve T_ASTERICOM Valve N_AVARIVENT Valve N+UECOVENT Valve N_EVARIVENT Valve KVARIVENT Valve CVARIVENT Valve DVARIVENT Valve T_RVARIVENT Valve BVARI Val v >

Mixproof No Yes eackage-free switching Yes Sterile products No No Yes Compact design No Excess pressure Yes TV Type approved Yes Yes No No ENT > ܮ VARIVENT > ή ή ή ή e R ShuttleValve YSTERICOM ShuttleValve X_AECOVENT ShuttleValve W_EVARIVENT ShuttleValve W or XVARIVENT ControlValve Aor SVARIVENT SamplingValve ITVARIVENT Vacuum-Valve VVARIVENT OverflowValve QVARIVENT SafetyValve >

T.VIS > ή Control module withdiverse possibilities of pneu- matic and electric connections. as well as integrated stroketravel measurement. The two-position stop movesthe valve into two repeatable positions. Standard actuator air-to-open spring-to-close. The lifting actuator is usedfor defined lifting of valvedisks for valve seat cleaning. Actuator air-to-open/air-to- close. Limit stop for definedadjustment of the openingand/or closing stroke length(for single-seat valves only). The booster cylinder is usedfor applications with low control air pressures. Lower sterile lock to protectthe...

Pneumatic actuator LanternManual actuator Damping cylinder with Bypass Control system T.VIS Single seatvalve insertsMixproofshuttle valve insertSingle seatshutlle valveinserts Mixproofvalve inserts Leakage connector(only for valves type D and Y) Booster cylinder Lifting actuator >

Alarge-sized optical round flashing indicator on the top of theT.VIS > ή control module shows clearly the current state of thevalve and makes it visible from afar by multicolour LEDs The user can immediately recognise the following valve positions:Non-actuated positionՕActuated position (rest position)Seat lift activated (on double-seat valves)ՕValve disk in movement Maintenance requestՕErrorLEFF > ծ function activated > The LEFF > function offers a considerable saving potential incleaning media during the lifting operation. The LEFF > Ε No adjustment work on the control module > is amodule...

Advantages of the double-seat technolgoy over the traditional block & bleed design: Schematic diagram > Double-seat Block & Bleed Reduced number of components ՕLow space requirementEasy to maintain, less labour inputՕOnly one electrical actuation signal No pockets ՕThe leakage outlet system never conveys product Reliable cleaning of the isloation chamber ՕThe isolation chamber can be cleaned without liquid pres-sure build-up, independently of the plant status and the open or closed position of the valve Function characteristic of VARIVENT > double-seat valves > ΕThe upper and lower valve...