The Lined Flange Pneumatic Butterfly Valve represents an innovative solution which provides exact flow control while maintaining safety in harsh environments. The advanced valve features a stainless steel body structure which receives complete lining protection from high-quality chemically resistant materials to defend against corrosive substances including acids and alkalis and other aggressive chemicals. The disc receives lining treatment to support operation across multiple applications. The pneumatic actuator provides quick precise and efficient valve position control which makes it suitable for high-pressure and high-temperature systems.
Lined butterfly valves is split body designed for a wide variety of liners such as PTFE, EPDM, NBR, FPM, PU to fit a wide range of applications.
PTFE is the preferred material for corrosive applications in chemical industry.
PU is the preferred material for abrasive applications.
EPDM is the preferred rubber for water industries.
NBR is the preferred rubber for oil transportation.
FPM is the preferred rubber for wide range of medium composition and temperature.
Lug design makes the valve convenient for disassembling between flanges and work well for dead end service with short length in pipe line.
FEATURES
ISO5211 direct mounting pad for easy automation
Isolation height according to plant prescription
Dirtscraper prevents moisture penetrating into the shaft area
Three PTFE impregnated SS316L bearings are provided for precision alignment of the disc-shaft
3 layers sealing system ensures environment protection
PTFE seat and rubber seat version interchangeable each other• PTFE-liner for chemically toxic and highly corrosive media, rubber liner for various of industry applications
Silicon rubber energized back behind PTFE seat makes the sealing between liner and disc stable and offer a wide range of temperature
One-piece disc-shaft design reduces the valve torque and increases Kv
PTFE or rubber lined disc design option avoids high cost by expensive metal in corrosive applications
Bubble-tight shut of at full pressure rating
Can be disassembled, material-specific recycling possible
Wave shape flange face design ensures the flange sealing of seat face not damaged by flange pressing, also avoids shrink of seat inside diameter because of flange pressing
PARTS LIST AND MATERIAL SPECIFICATION
No.
Part name
Material
1
Body
GGG40
2
Disc/shaft one piece
CF8M
1.4462
CF8M FEP lined
CF8 EPDM lined
3
Seat
PTFE,FPM,EPDM,PU,NBR
PTFE
EPDM
4
Seat Energizer
SR
5
Weather seal
NBR
6
Bearing
PTFE impregnated SS316L
7
Gland
PTFE
8
Screw
SS304
9
Belleville washer
SS304
10
Stuffing collar
SS316
11
O ring
FPM
12
V ring
PTFE
TECHNICAL DATA
Body style
Lug
Nominal diameter
2″ – 24″ (DN50mm – DN600mm)
Top flange
ISO5211
Operating pressure
16bar for DN50-DN200, 10bar for DN250-DN600
Temperature range
-20 °C to + 180 °C (depending on pressure, medium and material)
Flange accommodation
EN 1092 PN 6/PN10/PN16
ASME Class 150
AS 4087 PN10/ PN16
JIS 5K/10K
The PTFE Butterfly Valve consists of PTFE (Polytetrafluoroethylene). The material possesses several essential characteristics which make it suitable for this particular application. The material exhibits chemical inertness and shows resistance to corrosion and abrasion while being non-flammable and able to withstand temperatures up to 500 F (260 C) and features a low friction surface coating and serves as an excellent electrical insulator.
What is a Lined ptfe butterfly valve used for?
The Lined PTFE Butterfly Valve functions as a specialized valve which enables fast and dependable shut-off operations for corrosive and abrasive fluids. The valve serves multiple industrial sectors including chemical operations and pharmaceutical facilities and food processing facilities and petrochemical facilities and sewage treatment facilities.
The valve features a lined body structure where the liner material receives high-temperature bonding to resist various corrosive substances including sulfuric acid and phosphoric acid and nitric acid and others.
