• PFA lined butterfly valve FCD
  • PFA lined butterfly valve Stainless Steel

PFA lined butterfly valve


PFA / PTFE lined butterfly valve is designed for control and the isolation of aggressive media.
A fully Lined valve is highly recommended for abrasive and corrosive applications where require reliable performance, drop-tight shutoff, constant torque and no maintenance.

Standard Specifications
Valve Design: MSS SP-67, API 609
Face to Face: API 609, ISO 5752, EN558-1
Flange Adaptability: ANSI Class 150, PN10/16,  JIS 10K
Inspection & Testing: API 598, EN 12266
Mounting Flange: ISO 5211

Product Range
Body Configurations: Wafer and Lug
Valve Size: 1-1/2 "~16" (DN40 ~ DN400)
Temperature: -40C ~180C

Operator Available
Lever Handle, Gear Operator, Pneumatic and Electric Actuators


Lining Material
We use virgin resin of well-known brand to produce its PTFE, PFA fluoropolymers. Especially for lined valves, factors including liner thickness, resin quality and fabrication expertise always are more significant to affect valve performance and its service life.

Seat Liner
* Materials shall be PTFE and PFA.
* Molded and machined with min. 3mm nominal thickness
* Optional TFM liner available for extremely demanding applications

Disc lining
* Fully lined with PTFE or PFA
* Encapsulated with a min. 3mm thick PTFE or PFA
Liner thickness: in accordance with ASTM F1545, the lining thickness must be 3mm as min. In practice, thicker linings offer better safety under vacuum, better resistance against abrasion as well as lower gas permeability.

Electrostatic Spark Test
It is the test with a non-destructive high-voltage tester and shall be done prior to shipment. Each lined valve passes a 10,000 volts min. Spark test to detect any cracks or pin holes and ensure the integrity of the liner.

Design Change
In order to follow our commitment to continuous improvement, we reserve the right to revise or modify product and performance without prior notice.

No.

Part

Material

1

Body

Ductile Iron

Carbon Steel

Stainless Steel

2

Disc

Carbon Steel or Stainless Steel

PTFE / PFA

3

Stem

Stainless Steel

4

Seat

PTFE / PFA

5

Back-UP

Silicon / FKM

6

Belleville Washer

Steel Spring

7

Pusher

Stainless Steel

8

O-ring

FKM with PTFE

9

Bearings

316 with PTFE

10

Screw

Stainless Steel

Shaft
Square type stem head design facilitates adaption to automatic actuation.

One-piece disc / stem
Disc has spherically machined and hand polished disc edge hubs to eliminate torque and improve sealing capacity.

Seat
Molded liner is machined to provide low torque and reduce wear on the contacting parts.

ISO-5211 Mounting Flange
Universal mounting dimensions facilitate valve actuation.  Allows for direct mounting of several actuators.

Stem Bearings
Bronze or PTFE/SS bearings maintain shaft alignment. Self-lubricated bearings reduce side loading of shaft.

Body
2pc Split Body Construction with epoxy coating resists the effect of atmospheric corrosion. Polyester coating is optional.

Elastomer Back-up
It is the same width as the disc edge and locked into body groove. It provides resilience to body liner, giving bubble-tight seal.




  • Chemical Processing
  • Petrochemical
  • Pulp and Paper Processing
  • Solid handling
  • Purification Plants
  • Mining
  • Pharmaceutical Industry
  • Food Industry
  • Textile
  • Highly corrosive gas, liquid, slurry or powder