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Needle valve made of PE with an internal thread  

Needle valve made of PE with an internal thread


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  Needle valve made of PE with an external thread  

Needle valve made of PE with an external thread


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  Needle valve made of PE with angle bore  

Needle valve made of PE with angle bore


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Needle Valves made of plastic - Advantages, Applications, and Customizations








 
Needle valves made of plastic offer both advantages and disadvantages compared to other materials such as metal.

Advantages of plastic needle valves:


- Corrosion resistance: Plastic valves withstand a variety of chemicals and do not corrode, making them ideal for use in aggressive environments.
- Lightweight: Plastic valves are lighter than metal valves, making them easier to handle and transport.
- Good insulation properties: Plastics are good insulators, making them suitable for applications with high temperatures or electrical currents.
- Chemical resistance: Plastics are generally resistant to many chemicals, making them suitable for use in chemical and pharmaceutical industries.
- Cost-effectiveness: Plastic valves are usually more cost-effective than metal valves.

Disadvantages of plastic needle valves:


- Limited mechanical strength: Compared to metal valves, plastic valves have lower mechanical strength and may break or get damaged when subjected to excessive stress.
- Temperature limitations: Plastic valves have limited temperature resistance and can deform or melt at high temperatures.
- Pressure limitations: Plastic valves are less suitable for use at high pressures compared to metal valves.

Applications of plastic needle valves in the chemical, pharmaceutical, and process engineering industries:


- Chemical dosing: Plastic valves allow precise dosing of chemicals in chemical and pharmaceutical industries.
- Sampling: In process engineering, plastic valves can be used for the sampling of liquids and gases.
- Cleaning processes: Plastic valves are resistant to cleaning agents, making them suitable for cleaning processes in the food and beverage industry.
- Water treatment: Plastic needle valves are also used in water treatment and disinfection processes.

Summary:


Needle valves made of plastic have advantages and disadvantages in the chemical, pharmaceutical, and process engineering industries compared to other materials. Needle valves are ideal for use in aggressive environments and applications with high temperatures or electrical currents due to their corrosion resistance, lightweight, and good insulation properties. They are also resistant to a variety of chemicals, making them suitable for precise chemical dosing and sampling of liquids and gases. However, they have limitations in terms of temperature and pressure resistance as well as mechanical strength compared to metal valves. Nonetheless, plastic valves are an attractive alternative due to their cost-effectiveness. We offer plastic needle valves in various configurations, including through-hole with internal threads, through-hole with external threads, and an angled version with through-hole and internal threads.

We customize our standard program to meet individual customer requirements. Needle valves find applications in the chemical and process engineering industries, including laboratory and pilot plants. If you have any questions about our plastic needle valves, feel free to call us or send your inquiries via WhatsApp or email.


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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 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

Kwerk Practice Blog


The Kwerk team blogs from the field here



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