Special  >  CNC - machined parts  >  TRI-Clamp-connections

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made of PP  

made of PP

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  made of PVDF  

made of PVDF

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  made of PP-natural  

made of PP-natural

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made of PE 100  

made of PE 100

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  made of PE-natural  

made of PE-natural

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Kwerk GmbH - Your Leading Provider of Plastic Tri-Clamps Worldwide


Kwerk GmbH is the premier supplier of high-quality plastic Tri-Clamps, manufactured through precision injection molding and distributed globally. As the sole provider of these superior clamps, Kwerk GmbH offers a wide range of plastic materials such as PVDF, natural PP, PE, and PVC-U. Specifically designed for the pharmaceutical and food industries, these Tri-Clamps excel in their exceptional chemical resistance and hygienic properties.

Thanks to our state-of-the-art injection molding process, Kwerk GmbH ensures top-notch quality and precision in every plastic Tri-Clamp. With extensive experience and expertise in manufacturing injection molded parts, we guarantee that each product meets the highest standards. Kwerk GmbH’s plastic Tri-Clamps provide reliable and leak-free sealing for piping systems, tanks, and other equipment in the pharmaceutical and food industries.

As a worldwide distributor of plastic Tri-Clamps, Kwerk GmbH has the capability to deliver our high-quality products to customers across the globe. With an extensive distribution network and efficient logistics, we ensure fast and reliable delivery, regardless of the customer’s location.

Choose Kwerk GmbH’s plastic Tri-Clamps and benefit from the outstanding quality, precision, and reliability they provide. Trust the industry leader and leverage the extensive experience and expertise of Kwerk GmbH. Join our global network and establish a successful partnership.

Together we thrive - We are seeking global distribution partners for our premium plastic Tri-Clamps. Become part of our global success and seize the opportunity for a lucrative partnership with Kwerk GmbH. Contact us today and start your success story.

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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
Pot Strainer DN 200 - DN 500 Inliner PP/FRP Coated
Pot Strainer DN 200 - DN 500 Inliner FRP/CBL Coated
Angle Seat Strainer DN 200 - DN 400 Inliner FRP/CBL Coated
Manhole mad of FRP and PP/FRP

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 screw caps DN 150/DN 200
IBC adapters out of PE
IBC adapters out of PP

Attachment parts for tank construction

Vapor separators
CO2 - absorbes
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

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


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

Kwerk Practice Blog

The Kwerk team blogs from the field here

Partnership at the highest level.