PVDF (Kynar) Ferrule Fittings

Manufacturer, Supplier & Exporter of PVDF (Kynar) Ferrule Fittings

PVDF (polyvinylidene fluoride), marketed under trade names such as Kynar, is a high‑performance fluoropolymer known for excellent chemical resistance, UV stability, and relatively good mechanical strength among plastics. In fluid delivery systems, PVDF ferrule fittings are used where corrosion resistance to aggressive chemicals, high purity, or long-term durability is needed, but where metallic fittings may be vulnerable. Compared to PTFE, PVDF offers somewhat higher stiffness and better dimensional stability under pressure and temperature, though with a lower maximum service temperature (typically up to ~140‑150 °C depending on design).

In the design of PVDF ferrule fittings, one often uses a hybrid approach: the ferrule or sealing surface is made of PVDF, while the structural body or backup sleeve is metal (e.g. stainless steel) to resist deformation and support under compression. This allows combining the chemical resistance and inertness of PVDF with mechanical robustness. Because PVDF is less compliant than PTFE, the tolerances in machining and surface finish must be tighter to avoid leaks or stresses.

PVDF (Polyvinylidene Fluoride), commonly known by its trade name Kynar, is a high-performance thermoplastic widely used in demanding industrial applications due to its excellent chemical resistance, mechanical strength, and UV stability. PVDF Ferrule Fittings are a specialized type of compression fitting designed to create secure, leak-proof connections in fluid and gas handling systems. These fittings are especially valued in environments involving corrosive chemicals, ultra-pure liquids, and temperature-sensitive processes, making them suitable for industries like pharmaceuticals, food processing, chemicals, and water treatment..

Unlike standard metal ferrule fittings, PVDF Ferrule Fittings offer superior resistance to acids, bases, and organic solvents, along with a broad operating temperature range typically up to 140°C. Their lightweight nature, non-leaching properties, and long service life make them ideal for applications where contamination must be avoided. These fittings often feature a two-ferrule design to ensure tight sealing and mechanical grip, and may be used with plastic or metal tubing depending on system requirements.

In India, companies like Riddhi Siddhi Impex have earned a strong reputation as manufacturers and suppliers of industrial fittings, flanges, and valves. While their core offerings have traditionally included stainless steel and metallic tube fittings, their growing presence in the polymer fittings segment positions them well to cater to the rising demand for PVDF Ferrule Fittings. With their extensive manufacturing capabilities and strong customer base, they can offer both standard and custom PVDF fitting solutions..

PVDF (Kynar) Ferrule Fittings – Specifications

Property	Specification
Material	PVDF (Polyvinylidene Fluoride – Kynar)
Temperature Range	-40°C to +140°C
Pressure Rating	Up to 2300 PSI (Varies with size and design)
Connection Type	Double Ferrule / Compression
Application Areas	Pharmaceuticals, Water Treatment, Chemicals, Food & Beverage, Laboratories

Chemical Composition of PVDF

Element	Composition
Carbon (C)	~38%
Fluorine (F)	~62%

Mechanical Properties of PVDF

Property	Value
Tensile Strength	~40 MPa
Elongation at Break	~50%
Density	1.78 g/cm³
Hardness (Shore D)	~75

Dimension Chart for PVDF Ferrule Fittings

Tube OD (Inch)	Thread Size (NPT)	Length (mm)	Hex (mm)
1/8"	1/8" NPT	27	11
1/4"	1/4" NPT	32	14
3/8"	3/8" NPT	38	17
1/2"	1/2" NPT	45	22

Equivalent Grades

Standard	Equivalent Grade
ASTM	ASTM D3222
ISO	ISO 10993-1 (for biocompatibility)
FDA	Compliant with FDA 21 CFR 177.2510

Equivalent Standards

Standard	Description
ASTM D3222	Standard Specification for Unmodified PVDF Resin
ISO 10993	Biological Evaluation of Medical Devices
FDA 21 CFR	Food Contact Compliance

Other Types of PVDF Fittings

Type	Application
PVDF Elbow Fittings	For 90° direction changes
PVDF Tee Fittings	For branching flow into three directions
PVDF Reducer Fittings	To connect pipes/tubes of different sizes
PVDF Adapter Fittings	To transition between thread types or pipe systems

Riddhi Siddhi Impex supplies its products across a vast network of Indian cities, including Mumbai, Delhi, Bengaluru (Bangalore), Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, and Surat. Their distribution system also covers tier-2 and tier-3 cities like Vadodara, Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, Agra, and Varanasi. This wide reach ensures that businesses across India can access high-quality PVDF Ferrule Fittings quickly and reliably.

Frequently Asked Questions (FAQs)

Q1: What industries use PVDF Ferrule Fittings?

A1: These fittings are used in pharmaceuticals, food & beverage, water treatment, and chemical processing industries.

Q2: What are the advantages of using PVDF over metal?

A2: PVDF offers high chemical resistance, lightweight design, non-leaching properties, and excellent purity, unlike metals which may corrode.

Q3: Do you offer PVDF Ferrule Fittings in custom sizes?

A3: Yes, we provide custom sizes, threads, and designs based on your application and tubing requirements.

Q4: Are PVDF fittings suitable for outdoor applications?

A4: Yes, PVDF has excellent UV resistance and weatherability, making it suitable for outdoor and sunlight-exposed environments.