Ventilation  >  Valves


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Damper valves  

Damper valves


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  Butterfly valves  

Butterfly valves


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  Control valves  

Control valves


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check valve  

check valve


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  Shutter valve  

Shutter valve


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VENTILATION COMPONENTS

Chemical Resistance





UPVC


temperature limits for pumping media (depending on pressure)
from -5°C to +50°C
resistant
acids and lyes
non resistant
aromatic solvents, esters, ketones, chlorinated hydrocarbons

CPVC


temperature limits for pumping media (depending on pressure)
from -5°C to +100°C
resistant
acidic lyes, aliphatic  solutions
non resistant
aromatic solvents, esters, ketones, chlorinated hydrocarbons

PP


temperature limits for pumping media (depending on pressure)
from -5°C to +80°C
resistant
acids, lyes and weak  solvents
non resistant
oxidising solvents, halogens

PPs


temperature limits for pumping media (depending on pressure)
from -5°C to +80°C
resistant
acids, lyes and weak  solvents
non resistant
oxidising solvents and acids, halogens

 

PE


temperature limits for pumping media  (depending on pressure)
from -20°C to +70°C
resistant
acids, lyes and weak  solvents
non resistant
oxidising solvents and acids, halogens

PP-el, PPs-el


temperature limits for pumping media (depending on pressure)
from -5°C to +70°C
resistant
acids, lyes and weak  solvents
non resistant
oxidising solvents and acids, halogens

PVDF


temperature limits for pumping media  (depending on pressure)
from -20°C to +120°C
resistant
organic acids, inorganic  chemicals
non resistant
ketones, smoking sulphuric acid




VENTILATION COMPONENTS – JOINING



The attached Sleeves with PE, PP, PP-s, PP-s-el and PVDF materials should be joined with a circumferential weld joint on the sleeve. Joining by gluing the sleeve has proven to be efficient and suitable for small diameters of PVC material. With larger diameters, there is the danger that it can only be welded to a limited extent due to the internal production-related tension on the edges of the formed part. This is the reason why we recommend welding tests and consultation with our technical department. Please make sure there is sufficient torque with Flange joints including the correct screws and plain washers. Flange joints should be checked on a periodic basis and retightened wherever necessary. Please take thermal length elongation into account when installing both inside and outside of buildings. Avoid direct exposure to sunshine and other heat source factors. Any axial forces this causes may not be conducted into fittings. The dead weight of the fittings – in particular when equipping with drives or at large diameters – should not absorbed by the joined Pipeline components. Please provide the appropriate assembly situation for retightening the bearings, should it become necessary, with butterfly valves designed for them, with hand-adjusted flaps and for reading the flap opening on the graduated collar.

Skilled and qualified personnel should apply the opera-ting instructions of drive manufacturers and the relevant sets of rules to connecting the electrical and pneumatic drive elements. If the customer assembles the drive unit, please ensure that the fastening sleeve does not overload the shaft journal. Please follow the drive manufacturer’s assembly instructions. Modifying/rebuilding of Kwerk formed parts, fittings and components without authorisation jeopardises operating reliability and is not permitted. Take measures appropriate to your specific application of the electrically discharging Pipeline system to provide for equipotential bonding. We also recommend checking the leakage resistance on a regular basis, remembering that operating conditions might cause a change in the electrical properties of the materials over time. Refer to the ATEX sheet for more information.

Always comply with all safety instructions to prevent danger of accidents and because non-compliance with safety instructions can cause failures or destruction. Please follow the operating instructions of the drive manufacturers and relevant sets of rules if auxiliary ene-gy is used (electrical or pneumatic drives). Skilled and qualified personnel should carry out installation and the drives should be depressurised and deenergised before performing repair work. Take the appropriate safety precautions if existing line systems are repaired or modified and especially if the component parts are exposed to chemicals. Highly concentrated and aggressive chemical substances can develop, especially if there is a danger of condensate formation. Correct protective equipment must be worn and the rules for handling chemicals observed. Kwerk formed parts, fittings and accessories should not be modified or rebuilt without authorisation. Never operate the product in excess of the maximum application temperatures given (surroundings/media) and check the  chemical resistance of the chosen mate-rial in each case. Always follow the rules for handling  suctioned off media when cleaning Kwerk formed parts, fittings and accessories (wear protective clothing wherever necessary).




INFORMATION TO OUR DELIVERY PROGRAM



Plastic pipe systems


Overview of plastic pipe systems
Technical information on ABS pipe systems
Technical information on PVC  U pipe systems
Technical information on PVC  U transparent pipe systems
Technical information on PVC  C pipe systems
Technical information on PP pipe systems
Technical information on PP-R pipe systems
Technical information on PE pipe systems
Technical information on PVDF pipe systems

Chemiedur - pipe


Technical information on UP-GF (FRP) pipe systems
UP-GF (FRP) pipes
UP-GF (FRP) molded parts and connection
UP-GF-PP (FRP) molded parts and connection
UP-GF (FRP) adhesive collars
UP-GF (FRP) loose flanges

Plastic pipes


Calculator for cutting pipes
Guidelines for sawing plastic pipe
Leftovers in plastic pipe
Standardization of plastic pipes and molded parts
PVC U pipes deviations
Pressure loss in pipe systems out of PVC U, PVC C and ABS pipe systems
Distinction between Rp, R and G threads
Screw lengths for flange connections

Plastic fittings


PVC U transparent ball valves
Diaphragm valves
Block valves
Butterfly valves
Plastic needle valves
 

Plastic Valves according to ATEX


New EU guideline 2014/34/EU
Plastic Valves in EX zones
Y-Strainers PP-EL DN 15 - DN 50
Check valves PP-EL DN 15 - DN 50
Angle seat valves PP-EL DN 15 - DN 50

Bonding of plastic pipes


Bonding manual
Video showing the bonding of pipes

Plastic welding


Guidelines for extrusion welding


Grids / support grids


GFK grids
Grids out of PP -el electrically conductive
Profile support grids out of PP -el electrically conductive


Molded ventilation parts


Ventilation technology


Chemical hose


PVC transparent hose with fabric inlay


Industrial tanks and chemical containers


Dosing tanks and outer containers 35 – 1000 Liter
Salt dissolving tanks 60 -5000 Liter
Storage tanks and vats
Storage tanks for water
Safety and collecting troughs
Industrial tank delivery program
Dosing tanks with agitator
Dosing tank agitators
Dosing tanks with attachments
Dosing tanks made of sheet material
Customized chemical containers
Dosing tanks with level indicators



 

IBC TANKS/CONTAINERS


IBC screw caps DN 150/DN 200
IBC adapters out of PE
IBC adapters out of PP
MULTI FLEX BLOCK for IBC BULK CONTAINER



Attachment parts for tank construction


Vapor separators
CO2 - absorbes
Manholes
Revision nozzles
Block flange

Filter housings and filter cartridges


PENTEK 3G Slime Line filter housings
PENTEK 3G Standard filter housings
PENTEK Big Blue filter housings
PENTEK PP high temperature filter housings
PENTEK PP all nature filter housings
PENTEK filter bags for Big Blue filter housings
PENTEK surface filter cartridges
PENTEK filter cartridges for depth filtration
PENTEK filter cartridges with activated carbon
CINTROPUR filter systems
CINTROPUR water filters

Flange configurator


Blind flanges, loose flanges,  rectangular flanges

Chemical resistance


Table of chemical resistance for plastic pipe systems
 

Machined plastic parts


Inserts
Screw-in parts
Threaded fittings
Screw fittings

Milled plastic parts


Loose flanges and blind flanges made of sheet material

Static mixers


Static mixers made of plastic

Strainers


Single-type and double-type strainers
Pot strainer DN 300
Angle seat strainer DN 500


Flow meters


Variable area flow meters
Configuration tool for flow meters

Filter presses


Laboratory filter presses

Injection molded parts


Scraper made of PE for filter press


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