Economy Wafer-type Butterfly Valves (CF8/CF8/PTFE)
Popis
Wafer Type Butterfly Valve Technical Data Sheet
(Stainless Steel Body / PTFE Seat)
Product Name: Wafer Type Concentric Butterfly Valve
Model: D71X / D371X – Series
Date: February 16, 2026
- Product Overview
This valve features a wafer-type body design for easy installation between pipeline flanges. The valve is constructed entirely with stainless steel wetted parts (body and disc) and a PTFE (Polytetrafluoroethylene) seat, offering excellent corrosion resistance and chemical inertness. It is ideally suited for handling aggressive media in chemical, pharmaceutical, food processing, and water treatment industries.
- General Technical Specifications
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Item
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Specifikace
|
|
Typ ventilu
|
Wafer Type, Concentric (Centric) Butterfly Valve
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|
Nominal Size (DN)
|
DN50 ~ DN600 (2″ ~ 24″)
|
|
Nominal Pressure (PN)
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PN10 / PN16 / Class 150LB
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|
Structure Style
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Concentric (Center line) Design
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|
Connection Type
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Wafer-Type (Fits between EN 1092-2, ASME B16.5, or JIS flanges)
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|
Teplotní rozsah
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-29°C ~ +180°C (-20°F ~ +356°F)
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|
Applicable Media
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Acids, Alkalis, Chemical solutions, Potable Water, Food products, Pharmaceutical fluids
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|
Design Standard
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GB/T 12238 / API 609 / EN 593
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Face-to-Face Dimension
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ISO 5752 Series 20 (Short pattern) / API 609 Category A
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Pressure Testing
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ISO 5208 / API 598
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|
Operace
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Lever Handle (DN50-150), Worm Gear (DN200-600), Electric Actuator, Pneumatic Actuator
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- Material of Parts Specification
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Part Name
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Material / Grade
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Material Properties & Application
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|
Tělo
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Stainless Steel (ASTM A351 CF8 / CF8M)
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Equivalent to 304 or 316 stainless steel. Excellent corrosion resistance.
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|
Disk
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Stainless Steel (ASTM A351 CF8 / CF8M)
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Precision cast and polished disc for smooth operation and corrosion resistance.
|
|
Seat (Seal Ring)
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PTFE (Polytetrafluoroethylene)
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– Excellent chemical resistance: Inert to most acids, alkalis, and solvents.
– Low friction coefficient: Reduces torque requirements.
– Wide temperature range: Suitable for high-temperature chemical applications.
– Non-stick properties: Prevents media build-up.
|
|
Stem / Shaft
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Stainless Steel (SS304 / SS316)
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High strength, anti-corrosion.
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|
O-Rings / Body Seals
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EPDM or FKM (Viton) (depending on application)
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Provides sealing between body and liner; selected based on media compatibility.
|
|
Bushings
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PTFE / Reinforced PTFE
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Self-lubricating, prevents stem galling.
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- PTFE Seat Characteristics
- Chemical Resistance: PTFE is chemically inert and resistant to almost all industrial chemicals and solvents, except molten alkali metals and elemental fluorine at high temperatures.
- Temperature Resistance: Maintains stability from sub-zero temperatures up to 180°C.
- Low Friction: PTFE’s low coefficient of friction ensures low operating torque and extends valve life.
- Non-Stick Surface: Precribes adhesion of media, making it ideal for viscous or sticky fluids.
- FDA Compliance: PTFE materials can be supplied to meet FDA requirements for food and pharmaceutical applications upon request.
- Main Technical Characteristics
- Concentric Design: The stem passes through the center line of the disc, which contacts the PTFE seat for sealing. Simple, reliable, and cost-effective.
- Full Stainless Steel Construction: All wetted parts (body, disc) are stainless steel, providing superior corrosion resistance compared to ductile iron or coated valves.
- PTFE Lined Seat: The seat fully lines the body bore, isolating the body from the media and ensuring bubble-tight shut-off.
- Wafer Type Body: The valve is centered between two pipe flanges using precision-machined locating lugs, allowing for easy installation and removal without special tools.
- Bi-Directional Sealing: The PTFE seat design provides tight shut-off in both flow directions.
- Pressure-Temperature Rating (PTFE Seat)
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Temperature (°C)
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Max. Working Pressure (PN16 / Class 150)
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-29°C to +50°C
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16 Bar (232 psi)
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+100°C
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14 Bar (203 psi)
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+150°C
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11 Bar (160 psi)
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+180°C
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8 Bar (116 psi)
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Note: Pressure ratings decrease at elevated temperatures due to material properties of PTFE.
- Principal Dimensions & Connection Data (Reference PN10/16)
*Note: Final dimensions subject to approval drawings. Conforms to ISO 5752 Series 20 / API 609 Category A.*
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DN (mm)
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Size (inch)
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Face-to-Face L (mm)
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Body Diameter (mm)
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Bolt Circle Compatibility (mm)
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Approx. Weight (kg)
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|
50
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2″
|
43
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105
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Fits PN10/16/Class 150
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~2.5
|
|
65
|
2.5″
|
46
|
120
|
Fits PN10/16/Class 150
|
~3.5
|
|
80
|
3″
|
46
|
132
|
Fits PN10/16/Class 150
|
~5.0
|
|
100
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4″
|
52
|
156
|
Fits PN10/16/Class 150
|
~6.5
|
|
125
|
5″
|
56
|
184
|
Fits PN10/16/Class 150
|
~8.5
|
|
150
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6″
|
56
|
210
|
Fits PN10/16/Class 150
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~11.0
|
|
200
|
8″
|
60
|
268
|
Fits PN10/16/Class 150
|
~16.0
|
|
250
|
10″
|
68
|
320
|
Fits PN10/16/Class 150
|
~22.0
|
|
300
|
12″
|
78
|
370
|
Fits PN10/16/Class 150
|
~32.0
|
|
350
|
14″
|
92
|
430
|
Fits PN10/16/Class 150
|
~45.0
|
|
400
|
16″
|
102
|
482
|
Fits PN10/16/Class 150
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~60.0
|
- Applicable Standards & Testing
- Design & Manufacture: API 609 Category A / ISO 5752 / EN 593 / GB/T 12238
- Osobní setkání: ISO 5752 Series 20 (Short pattern)
- Flange Compatibility: EN 1092-2, ASME B16.5 (via wafer mounting), JIS B2220
- Testing Standard: ISO 5208 / API 598
- Pressure Tests:
- Shell Test: 1.5 x Rated Pressure
- Seat Test: 1.1 x Rated Pressure (Bi-directional)
- Leakage Rate: Rate A (No visible leakage) per ISO 5208
- Poznámky
- This Stainless Steel + PTFE combination offers the best corrosion resistance for chemical applications.
- PTFE seat provides low torque operation and requires no maintenance.
- For higher temperature applications (>180°C), alternative seat materials such as RTFE or PEEK should be considered.
- Available with various disc and body options: CF8 (304), CF8M (316), or CF3M (316L) for enhanced corrosion resistance.
- Actuator mounting flange conforms to ISO 5211 for easy automation.
ZÁRUKA:
Společnost SAVVY VALVES se zavazuje poskytovat výjimečnou kvalitu produktů a bezstarostný poprodejní servis. Naše ventily mají zaručenou minimální životnost 12 měsíců, během níž zdarma dodáme všechny potřebné náhradní díly a podrobné pokyny k údržbě. V případě poškození, které není způsobeno lidskou činností, v rámci záruční doby bezplatně vyměníme komponenty a poskytneme profesionální technickou podporu. Po uplynutí záruky zákazníci uhradí pouze náklady na náhradní díly a zároveň mohou využívat zlevněné služby údržby. Naším cílem je pomáhat klientům snižovat provozní náklady a zvyšovat efektivitu výroby prostřednictvím spolehlivé kvality a komplexní poprodejní podpory. Ať už se jedná o technické dotazy nebo potřeby údržby, náš tým odborníků vám promptně zareaguje, aby zajistil, že váš ventilový systém bude vždy udržovat optimální výkon.
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