Nishtha Engineering Services

Butterfly Valves

Lined Butterfly Valves

PTFE / PFA lined valves for corrosive chemicals, giving full chemical resistance at a fraction of the cost of alloy valves.

Lined Butterfly Valves

Overview

A lined butterfly valve features a durable lining, such as PTFE, to protect against corrosive and abrasive fluids. This design ensures reliable sealing, reduces maintenance, and provides excellent chemical resistance, making it ideal for harsh industrial environments.

Key features

  • Corrosion-Resistant Lining: PTFE, PFA, FEP, or other durable linings protect against corrosive and abrasive fluids.
  • Durable Body Materials: Constructed from cast iron, ductile iron, stainless steel, or carbon steel for strength and longevity.
  • Versatile Disc Options: Discs made from stainless steel, ductile iron, or Hastelloy, often coated with corrosion-resistant materials.
  • Reliable Sealing: Seats made from PTFE, EPDM, NBR, or Viton ensure tight sealing and leak prevention.
  • Wide Size Range: Available in sizes from 2 inches to 48 inches (DN 50 to DN 1200) to suit various applications.
  • Pressure and Temperature Tolerance: Can handle pressures up to ANSI Class 150 and temperatures ranging from -20°C to 200°C (-4°F to 392°F).
  • Flexible Connection Types: Available in wafer, lug, and flanged connections for easy integration into different piping systems.
  • Multiple Actuation Options: Can be operated manually or equipped with electric, pneumatic, or hydraulic actuators for automated control.
  • Compliance with Standards: Meets standards such as API 609, ISO 5752, EN 593, and ASME B16.5, ensuring reliability and safety.

Technical specifications

Size Range
NPS 2 to 24 / DN 50 to 600
Body Materials
Cast Iron,
Ductile Iron,
Stainless Steel,
Carbon Steel
Temperature Range
0°F to 392°F (-18°C to 200°C)
Stem Materials
17-4 PH Stainless Steel
Maximum Allowable Operating Pressure
150 psi (10 Bar)
Seat Materials
PTFE, Conductive PTFE, UHMWPE
Shutoff Rating
Bidirectional Bubble-tight
Disc Materials
Stainless Steel, PTFE/SS, PFA/SS, UHMWPE/SS, UHMWPE/DI, Hastelloy®, Titanium
Body Style
Wafer, Lug
Flange Drilling
ASME B16.1 Class 125, ASME B16.5 Class 150, EN 1092 PN 10, 16
Testing Standard
MSS SP-61, API 598, EN 12266-1
Certifications
ABS, ATEX, Bureau Veritas, DNV, PED, PE(S)R, SIL
Face To Face
MSS SP-67, API 609 Category A, EN 558 Series 20
Seat Energizer Material

Benefits

  • Versatility: The primary benefit of 4-way plug valves is their versatility in controlling flow direction and diverting fluids between different process lines or systems. They offer flexibility in system design and can replace multiple valves in certain applications.
  • Space Efficiency: By integrating multiple flow paths into a single valve body, 4-way plug valves can reduce the need for additional piping and valves, thereby optimizing space and simplifying installation.
  • Reduced Potential Leak Points: Compared to using multiple valves and fittings, 4-way plug valves minimize the number of potential leak points in a system, enhancing overall system reliability and safety.
  • Cost Savings: Consolidating multiple flow control functions into a single valve can lead to cost savings in terms of valve procurement, installation labor, and maintenance.
  • Efficient Flow Control: The design of 4-way plug valves allows for precise control over flow distribution and direction, making them suitable for applications requiring accurate flow management and process control.
  • Suitability for Complex Systems: They are well-suited for use in complex piping systems, such as in chemical processing, oil and gas, water treatment, and other industries where efficient flow routing and versatility are critical.
  • These features and benefits make lined butterfly valves an excellent choice for industries requiring robust and reliable fluid control solutions in challenging environments.

Frequently asked questions

Application engineering

Specify your requirement.

Share your process conditions, required configuration and quantity. Our team will confirm suitable options and available documentation.

Request a quotation

Share your specification — size, class, media and quantity — and we will revert with availability and pricing.