PVC-U valves, PVC-U fittings and PVC-U pipe:
Developed in 1930 in Germany, PVC-U (rigid polyvinyl chloride - unplasticized) is obtained through the polymerization process of vinyl chloride monomer. With the presence of chlorine in the PVC-U molecule, a resin is obtained which guarantees excellent performance in terms of thermal stability, chemical and mechanical resistance up to temperatures of 60 °C.
The diversity of formulations obtained through the addition of suitable additives and stabilizers, make PVC-U the most versatile of plastic materials, allowing it to adapt to different applications and needs in the most varied fields of use of fluids under pressure.
PVC-U represents one of the most economically viable solutions in the field of thermoplastic and metallic materials to solve the problems encountered in the transport of industrial corrosive fluids, and in the distribution and treatment of water in general (PVC valve, PVC fittings and pvc).
Properties of PVC-U:
The fundamental reasons for this preference are to be attributed to the peculiar characteristics of the resin, of which those below can be mentioned.
Good chemical resistance
PVC-U resins guarantee excellent chemical resistance against most acids and alkalis, paraffinic/aliphatic hydrocarbons and saline solutions. Not recommended for use in the transportation of polar organic compounds including various types of chlorinated and aromatic solvents. PVC-U resins also offer complete compatibility in the transport of food fluids, demineralised water, drinking water and water for purification, according to current national and international standards. PVC-U resins are also characterized by their low oxygen permeability and low water absorption (0.1% at 23 °C according to ASTM D 570).
Good thermal stability
PVC-U resins guarantee good thermal stability in the intermediate temperature range between 20 °C and 50 °C and find their typical use in industrial and aqueduct applications, guaranteeing performances of excellent mechanical resistance, discrete rigidity, reduced coefficients of thermal expansion and high safety factors in the service. The PVC-U compounds also have remarkable characteristics of resistance to combustion, the flame, in fact, ignites at 399 °C and persists only in extreme conditions: if the oxygen concentration is 2 times higher than the atmospheric one, or in the presence of a flame from an external source. Trigger temperature: 399°C. Oxygen Index: 45%. UL 94 class: V0. Thanks to the reduced coefficient of thermal conductivity (λ = 0.15 W/m °C according to ASTM C177) the use of PVC-U resins in the transport of hot fluids guarantees limited heat loss and a virtual elimination of condensation problems.
Good mechanical resistance
The excellent mechanical characteristics combine good impact resistance with the ability to withstand operating pressures in the order of 4 – 6 – 10 – 16 bar at 20 °C.
Duration over time
PVC-U resins have a high value of the circumferential breaking load (Minimum Required Strength MRS ≥ 25.0 MPa at 20 °C) and allow to obtain extremely long life times of the installations, without any particular physical-mechanical decays.
PVC-U valves, PVC-U pipe and PVC-U fittings
Our PVC-U systems have been selected for the construction of millions of euro industrial plants because they are capable of safely transporting numerous acids, alkalis and chemical concentrates, without the risk of corrosion or environmental pollution.
Aliaxis offers a complete range of pipes and fittings for chemical cold welding or threaded, as well as PVC ball, butterfly, diaphragm, check and auxiliary valves.
Online the new Valves Configurator Aliaxis
This tool offers two paths to guide you through the technical and functional characteristics of our wide range of solutions and to help you find the ideal valve that meets your needs. Starting from a range of over 12,000 codes, consider that it will take at least five steps before finding the perfect solution for you.
Discover the new FIP branded PVC-U fittings
ISO-UNI PVC-U pipe
Pressure tube.
Pressure pipes for joint system by cold chemical welding (gluing) through the use of suitable WELD-ON glue and primer-detergent.
ISO-UNI PVC-U fittings
Metric series solvent weld fittings.
Series of fittings for PVC-U pipes intended for the conveyance of pressurized fluids with a joint system by cold chemical welding (gluing) through the use of a suitable glue and primer-detergent.
PVC-U ISO-BSP fittings
Passage Fittings.
Series of fittings for PVC-U pipes intended for the conveyance of pressurized fluids with jointing system by threading and cold chemical welding (gluing) through the use of a suitable glue and primer-detergent.
PVC-U BSP fittings
Threaded fittings.
Series of fittings for PVC-U pipes intended for the conveyance of pressurized fluids with joint by threading.
PVC-U BS fittings
Unions for solvent welding and threaded.
Series of fittings for PVC-U pipes intended for the conveyance of pressurized fluids with jointing system by gluing and by threading according to British Standard.
VKD Dual Block valve
DUAL BLOCK® 2-way ball valve
FIP has developed a VKD DUAL BLOCK® type ball valve to introduce a high reference standard in the design of thermoplastic valves. VKD is a radially disassembled collet ball valve that meets the most stringent requirements required in industrial applications.
VKR Dual Block valve
DUAL BLOCK® regulating ball valve.
The VKR DUAL BLOCK® valve combines the high levels of reliability and safety typical of the VKD full bore ball valve with the new flow regulation function with linear type characteristic curve which meets the most stringent requirements typical of industrial applications.
TKD Dual Block valve
DUAL BLOCK® 3-way ball valve.
FIP has developed a TKD DUAL BLOCK® type ball valve to introduce a high reference standard in the design of thermoplastic valves. TKD is a radially disassembled shunting and mixing ball valve that meets the most stringent demands required in industrial applications.
VXE Easyfit valve
Easyfit 2-way ball valve.
FIP and Giugiaro Design have designed and developed VXE Easyfit, the innovative radial disassembly ball valve with ring nut tightening adjustment that allows simple and safe installation for reliable service over time. This valve is also equipped with the customized Labeling System.
VEE Easyfit valve
Easyfit 2-way ball valve.
FIP and Giugiaro Design have designed and developed VEE Easyfit, the innovative radial disassembly ball valve with ring nut tightening adjustment that allows simple and safe installation for reliable service over time.
SSE-SXE Easyfit valve
Easyfit ball and spring check valve.
The Easyfit line of check valves developed with Giugiaro Design offers two different versions: SXE with ball shutter and SSE with spring shutter. The Easyfit check valves are distinguished by the innovative installation method which guarantees reliable service over time. This valve is also equipped with the customized Labeling System.
FE valve
Butterfly valve.
The FE is a shut-off and regulating butterfly valve, specifically designed for water transport applications and equipped with the customized Labeling System.
FK valve
Butterfly valve.
The FK is a shut-off and regulation butterfly valve, with structural characteristics that are ideal for use in industrial applications that require high performance and reliability over time. This valve is also equipped with the customized Labeling System.
DK Dialock valve
DIALOCK® 2-way diaphragm valve.
The DK DIALOCK® diaphragm valve is ideal for regulating and shutting off abrasive fluids or fluids with impurities. The new internal geometry of the body significantly increases the flow coefficient, reduces pressure drops and allows accurate adjustment over the entire poppet stroke. The DK has reduced dimensions and weight. The innovative handwheel is equipped with a patented mechanism for locking the manoeuvre, immediate and ergonomic, which allows you to lock any adjustment position reached.
CM valve
Compact diaphragm valve.
The CM is a manually operated diaphragm valve of reduced dimensions and particularly compact structure, ideal for use in confined spaces.
MV valve
Diaphragm valve.
The VM is particularly suitable for the regulation and interception of abrasive fluids or fluids containing impurities. The handwheel control and the diaphragm seal allow precise and effective regulation and reduce the risk of water hammer to a minimum.
Do you need to make a flanged connection?
Aliaxis has designed the innovative 3+ Backing Ring which, thanks to its optimized design, combines a unique lightness with exceptional mechanical strength, ensuring a simple, safe and reliable installation.
Are you interested in the actuated versions?
Beside the manually operated versions, Aliaxis offers the actuated versions which are made using actuators compliant with current regulations and selected by FIP on the basis of their quality and reliability requirements. The efficiency of these valves, tested according to the company's quality standards, is guaranteed by the expertise and know-how that FIP dedicates to the creation of its products.
Normative requirements
The production of the PVC-U lines is carried out following the highest quality standards and in full compliance with the environmental constraints imposed by the laws in force and in accordance with the ISO 14001 standard. All products are manufactured in accordance with the quality assurance system according to the ISO 9001 standard.
- ASTM D 1784 cl. 12454 Rigid PVC-U blends (for industrial applications)
- ASTM D 1785 Standard for Sch. PVC Pipes 40-80-120
- ASTM D 2464 Standard Specification for Polyvinyl Chloride (PVC) Threaded Fittings for Plastic Pipe
- ASTM D 2467 Standard Specification for Polyvinyl Chloride (PVC) Plastic Pipe Fittings, Sch.80
- BS 10 Specification for flanges and bolts for pipes, valves and fittings
- BS 3505 PVC-C pipes for cold water
- BS 4346-1 Glued joints and fittings for PVC pipes
- DIN 2501 Flanges, dimensions
- DIN 2999 Whitworth thread for threaded pipes and fittings
- DIN 8061 PVC-U pipes: General quality and test requirements
- DIN 8062 Dimensions of PVC-U pipes
- DIN 8063 Dimensions of PVC-U fittings
- DVS 2204 - DVS 2221 Bonding of thermoplastic materials PVC-U
- EN 1092-1 Flanges and their joints - Circular flanges for pipes, valve fittings and accessories - Part 1: Steel flanges, design according to PN
- EN ISO 1452 Characteristics of PVC-U fittings and pipes for piping systems in the field of water supply
- EN ISO 15493 Component systems (Pipes, Fittings and Valves) in ABS, PVC-U, PVC-C for industrial applications
- ISO 7 PVC-U fittings with threaded ends for sealing coupling
- ISO 161-1 Dimensions of metric series PVC-U pipes and fittings
- ISO 228-1 PVC-U fittings with threaded ends
- ISO 727 PVC-U pipes and fittings. Metric series dimensions and tolerances
- JIS K 6741 PVC-U pipes
- JIS B 0203 Tapered pipe threads
- JIS K 6743 Polyvinyl chloride (PVC-U) fittings for water supply l UNI 11242 Bonding of PVC-U pipes, fittings and valves
Approvals and quality marks
ABS The FIP system in PVC-U is recognized as suitable for the conveyance, treatment of sanitary and conditioning waters on board ships and other units classified by the American Bureau of Shipping (ABS)
ACS France (Attestation de conformité Sanitaire) Suitability of PVC-U for food applications
BSI (British Standards Institution UK) PVC-U fittings in accordance with BS 4346-1
Bureau Veritas Suitability of PVC-U for conveying, treating sanitary and conditioning water in the naval sector
CSTB PVC-U pipe and fittings in compliance with NF T 54-028 standard
IIP N. 122 Italian Institute of Plastics PVC-U pipe and fittings in accordance with the UNI EN ISO 1452 standard
KIWA (Keurings Institut Voor Waterleiding Artikelen Holland) PVC-U fittings in accordance with KIWA BRL K17301 standard
UKR SEPRO PVC-U FIP fittings are certified in accordance with Ukrainian regulations for Safety, Hygiene and Quality
WRAS (Water regulations advisory scheme - UK) Suitability of PVC-U for the transport of drinking water (Water Regulation Advisory Scheme - UK)
RMRS The FIP system in PVC-U are recognized as suitable for the conveyance, treatment of sanitary and conditioning waters on board ships and other units classified by the Russian Maritime Register of Shipping
DNV-GL The FIP systems in PVC-U are recognized as suitable for the conveyance, treatment of sanitary and conditioning waters on board ships and other units classified by the DNV-GL
NIZP FIP PVC-U fittings are recognized suitable for the transport of drinking water by the NIZP (National Institute of Public Health - Poland)
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