Email: [email protected]
Phone: +91 93135 43530
Address: 133/1 Ground, Mansuri Block, Opp. Dudheshwar Water Tank, Ahmedabad-380004, Gujarat, India
CI Teflon Seated Butterfly Valve Wafer Type 150# Supplier in India | KELOR
Krishna Industries (KELOR), based in Ahmedabad, Gujarat, supplies Cast Iron Teflon Seated Butterfly Valve — Wafer Type 150# — CI body with PTFE (Teflon) disc and seat — SS stem — DN40 to DN600 — manual and gear operated — -10°C to 120°C — water, chemical, HVAC, fire-fighting — MOQ 10 Nos — Pan India dispatch from Ahmedabad.
Industrial Valves, Fasteners, Gaskets & Safety Equipment — our complete business scope. GST invoice with every dispatch.
⚡ Quick Reference
SupplierKrishna Industries (KELOR) — Ahmedabad, Gujarat
Valve TypeButterfly Valve — Wafer Type
Body MaterialCast Iron (GG25)
Seat / DiscPTFE (Teflon)
StemStainless Steel
Pressure Rating150# (PN16)
Size RangeDN40 (1-1/2″) to DN600 (24″)
MOQ10 Nos per size
📜 On This Page
- Overview — CI Teflon Seated Butterfly Valve
- How a Wafer Butterfly Valve Works
- Material of Construction
- Why PTFE (Teflon) Seating
- Technical Specifications
- Available Sizes — DN40 to DN600
- Applications
- Wafer vs Lug Type
- Installation Guidelines
- Why Choose KELOR
- Commercial Information
- Related Products
- Frequently Asked Questions
Cast Iron Teflon Seated Butterfly Valve — Overview
Krishna Industries (KELOR) supplies the Cast Iron Teflon Seated Butterfly Valve — Wafer Type 150# — a quarter-turn rotary valve designed for ON–OFF flow control and isolation in industrial piping systems. The cast iron body provides mechanical strength for water, chemical, and general industrial service, while the PTFE (Teflon) disc and seat combination delivers chemical resistance against acids, alkalis, salts, and corrosive process fluids that would rapidly degrade standard rubber or elastomer seats. The stainless steel stem provides corrosion resistance at the stem seal area, which is a common failure point on butterfly valves in corrosive environments.
The wafer-type design allows installation between standard ANSI 150# (PN16) pipeline flanges using through-bolts — the valve has no extended flanges of its own, reducing weight, installation space, and bolt count. This makes the wafer butterfly valve the most compact and economical butterfly valve configuration for dead-run piping (piping that is not disassembled for maintenance). KELOR supplies these valves from verified vendor partners with manual lever handles for sizes up to DN150 and gear operators for sizes DN200 and above, with Pan India dispatch from the Ahmedabad warehouse.
How a Wafer Butterfly Valve Works
A butterfly valve uses a circular disc (the butterfly) mounted on a rotating stem at the centre of the valve body. The disc rotates 90 degrees (quarter turn) to open or close the valve. In the fully open position, the disc is parallel to the flow path and the media passes through with minimal obstruction and low pressure drop. In the fully closed position, the disc is perpendicular to the flow and the PTFE seat seals against the disc edge, providing bubble-tight shut-off. The PTFE seat is mechanically retained in the CI body and compresses against the disc when the valve is closed, creating a leak-proof seal.
1
Open Position
The disc rotates 90 degrees to align parallel with the flow. Media passes through the valve bore with minimal pressure drop. The disc edge is fully clear of the PTFE seat.
2
Flow Through
In the open position, the wafer body presents minimal obstruction to flow. Pressure drop across a fully open butterfly valve is significantly lower than through a gate valve or globe valve of the same size.
3
Throttling
Partial rotation (between 0 and 90 degrees) allows flow regulation. The butterfly valve can be used for moderate throttling service, although best practice limits throttling to 30–70% open range to avoid disc flutter and seat damage.
4
Closed Position
The disc rotates 90 degrees to the fully closed position. The PTFE seat compresses against the disc perimeter, providing bubble-tight shut-off. The quarter-turn operation is fast and repeatable.
Material of Construction
CI Body
PTFE Seat
PTFE Disc
SS Stem
| Component | Material | Purpose |
|---|---|---|
| Body | Cast Iron (GG25 / FC250) | Provides mechanical strength and rigidity for the pressure boundary. CI is economical and suitable for water, chemical, HVAC, and general industrial service up to 150# / PN16. |
| Disc | PTFE (Teflon) | PTFE disc provides a chemically inert closure element that resists acids, alkalis, salts, and solvents. The disc seats directly against the PTFE seat for bubble-tight shut-off. |
| Seat | PTFE (Teflon) | PTFE seat is mechanically retained in the body bore. Provides chemical resistance and low-friction sealing against the disc. Replaces rubber or elastomer seats where chemical compatibility is required. |
| Stem | Stainless Steel (SS304 / SS316) | SS stem resists corrosion at the stem seal area where moisture and process media contact the stem. Two O-ring stem seals prevent leakage along the stem. |
Why PTFE (Teflon) Seating
PTFE (Polytetrafluoroethylene, commonly known as Teflon) is one of the most chemically inert materials available for valve seating. Unlike rubber or elastomer seats that swell, crack, or degrade when exposed to aggressive chemicals, PTFE maintains its properties across virtually all industrial media. The PTFE seat and disc combination makes this butterfly valve the correct selection for chemical processing, effluent treatment, and any application where the media has properties that would damage standard EPDM, NBR, or Viton seats.
🔬 PTFE Properties Relevant to Valve Seating
- Excellent chemical resistance — virtually inert to all acids, alkalis, salts, and organic solvents at ambient and moderately elevated temperatures
- Low coefficient of friction — provides smooth disc rotation and low operating torque, reducing wear on the seat and extending service life
- Non-stick surface — process media does not adhere to the PTFE seat or disc, reducing build-up and fouling in slurry or viscous fluid service
- Wide temperature range — PTFE retains sealing properties from -10°C to 120°C in CI body construction
- No ageing or degradation — PTFE does not harden, crack, or deteriorate over time like rubber seats, providing longer service intervals between seat replacement
Technical Specifications
| Parameter | Specification |
|---|---|
| Valve Type | Butterfly Valve — Wafer Type |
| Body Material | Cast Iron (GG25 / FC250) |
| Disc Material | PTFE (Teflon) |
| Seat Material | PTFE (Teflon) |
| Stem Material | Stainless Steel (SS304 / SS316) |
| Pressure Rating | 150# (PN16 / 16 Bar) |
| Size Range | DN40 (1-1/2″) to DN600 (24″) |
| End Connection | Wafer — installed between ANSI 150# flanges |
| Operation | Manual (lever) / Gear Operated |
| Temperature Range | -10°C to 120°C |
| Flange Compatibility | ANSI B16.5 Class 150 / DIN PN16 |
| MOQ | 10 Nos per size |
Available Sizes — DN40 to DN600
CI Teflon seated butterfly valves wafer type 150# are available in the full size range from DN40 (1-1/2 inch) to DN600 (24 inch). Smaller sizes DN40 to DN150 are supplied with manual lever handles as standard. Sizes DN200 and above are supplied with gear operators for the higher torque required at larger disc diameters. All sizes fit between standard ANSI 150# flanges using the same bolt circle as the flanges.
| Size (DN) | Size (Inch) | Design | Pressure | Standard Operation |
|---|---|---|---|---|
| DN40 | 1-1/2″ | Wafer | 150# | Manual Lever |
| DN50 | 2″ | Wafer | 150# | Manual Lever |
| DN65 | 2-1/2″ | Wafer | 150# | Manual Lever |
| DN80 | 3″ | Wafer | 150# | Manual Lever |
| DN100 | 4″ | Wafer | 150# | Manual Lever |
| DN150 | 6″ | Wafer | 150# | Manual Lever |
| DN200 | 8″ | Wafer | 150# | Gear Operated |
| DN250 | 10″ | Wafer | 150# | Gear Operated |
| DN300 | 12″ | Wafer | 150# | Gear Operated |
| DN350 | 14″ | Wafer | 150# | Gear Operated |
| DN400 | 16″ | Wafer | 150# | Gear Operated |
| DN450 | 18″ | Wafer | 150# | Gear Operated |
| DN500 | 20″ | Wafer | 150# | Gear Operated |
| DN600 | 24″ | Wafer | 150# | Gear Operated |
Applications
Water Treatment Plants
Municipal water treatment, effluent treatment, and demineralisation plants use CI PTFE seated butterfly valves for chemical dosing line isolation, filter backwash control, and process flow regulation where rubber seats may degrade in chlorinated or chemically treated water.
Chemical Processing
Chemical and petrochemical plants use PTFE seated valves for isolation and control of mildly corrosive acids, alkalis, and salt solutions. PTFE’s chemical inertness provides reliable sealing across a wide range of process chemicals at ambient temperature.
HVAC Systems
HVAC chilled water and hot water circuits use CI butterfly valves for flow balancing and isolation. The compact wafer design fits in tight mechanical room layouts. PTFE seats provide long service life without the hardening and cracking that affects EPDM seats over time.
Fire-Fighting & General Industrial
Fire-fighting pump discharge lines, general industrial cooling water, and process piping use CI PTFE seated butterfly valves for reliable ON–OFF isolation. Low torque operation enables quick manual operation during emergency shutdown scenarios.
Wafer vs Lug Type Butterfly Valve
| Parameter | Wafer Type | Lug Type |
|---|---|---|
| Installation | Clamped between two flanges with through-bolts | Bolted individually to each flange using tapped lugs |
| Dead-End Service | Not suitable — cannot support one-sided flange removal | Suitable — downstream piping can be removed while valve stays in line |
| Weight | Lighter — no flange lugs on body | Heavier — flange lugs add weight |
| Cost | More economical — simpler body construction | Higher cost — additional lug machining and material |
| Best For | Standard piping, water lines, HVAC, chemical lines where full disassembly is not required | Pump suction/discharge, dead-end isolation, tank connections, and systems requiring periodic downstream maintenance |
Installation Guidelines
A wafer butterfly valve is installed between two pipeline flanges using through-bolts and gaskets. Proper installation is essential for leak-free operation and long service life. The following guidelines apply to all sizes of CI Teflon seated wafer butterfly valves:
🔧 Installation Steps
- Ensure pipeline flanges are parallel, aligned, and clean before installing the valve
- Position the valve between the flanges with the disc in the partially open (15–20% open) position to prevent the disc edges from catching the flange faces during bolt insertion
- Use full-face gaskets on both sides of the valve between the valve body and pipeline flanges
- Insert through-bolts and tighten evenly in a criss-cross pattern — uneven tightening distorts the wafer body and prevents proper seating
- After bolting, rotate the disc to the fully closed position and verify that the disc seats evenly against the PTFE seat all the way around
- Ensure adequate clearance around the valve for lever handle or gear operator swing radius — the lever rotates 90 degrees during operation
- Never use pipe wrenches or leverage on the lever handle to force a stuck disc — this can crack the PTFE seat or damage the stem
Why Choose KELOR
✅
Quality from Verified Vendors
Every CI PTFE seated butterfly valve is sourced from verified vendor partners who supply to consistent quality standards. KELOR inspects incoming stock for dimensional accuracy and finish quality.
🚚
Pan India Dispatch
Standard sizes DN50 to DN200 dispatched within 3 to 5 working days. Larger sizes and gear operated variants within 5 to 7 working days from the Ahmedabad warehouse.
💰
Competitive Pricing
KELOR offers competitive pricing for project BOM orders and bulk quantities across the full size range DN40 to DN600. Ex-Ahmedabad warehouse pricing for domestic orders.
🌐
Export Supply
KELOR supplies CI PTFE seated butterfly valves for export orders with export-grade packing, commercial invoices, and shipping documentation. Export pricing varies by destination and quantity.
🏢
OEM Branding Support
KELOR supports OEM buyers with neutral packing and customised labelling. Buyer’s brand name and part number can be printed on packaging for bulk project orders.
📋
Full Documentation
GST invoice with every dispatch. Documentation customised for project requirements including purchase order references and delivery challans.
Commercial Information
💰 Pricing & Ordering
MOQ10 Nos per size
GST18% (HSN 8481 80 90)
Dispatch3–5 days (DN50–DN200), 5–7 days (DN250–DN600)
PackingStandard industrial packing for transport
PaymentAdvance or as agreed for project orders
DocumentationGST Invoice, Delivery Challan
ExportAvailable with commercial invoice and shipping docs
RFQWhatsApp or email size, quantity, operation type, delivery location
Related Products
Frequently Asked Questions
What is a Teflon seated butterfly valve and where is it used?
A Teflon (PTFE) seated butterfly valve has a PTFE seat and PTFE-coated or PTFE-encapsulated disc that provides chemical resistance against acids, alkalis, salts, and corrosive industrial fluids. It is used in chemical processing, water treatment, HVAC chilled water, effluent treatment, and any application where the media has corrosive or mildly acidic properties that would degrade rubber or elastomer seats.
What is the maximum temperature for a CI Teflon seated butterfly valve?
The maximum operating temperature for a cast iron Teflon seated butterfly valve is 120°C (248°F). PTFE retains its sealing properties up to approximately 200°C, but the cast iron body and the PTFE-to-CI bonding limit the practical operating temperature to 120°C. For temperatures above 120°C, consider metal-seated butterfly valves or high-temperature elastomer seats such as Viton.
What sizes are available for CI wafer type butterfly valve 150#?
CI wafer type butterfly valve 150# is available from DN40 (1-1/2 inch) to DN600 (24 inch). The wafer design allows installation between standard ANSI 150# flanges. Common sizes stocked for quick dispatch include DN50, DN65, DN80, DN100, DN150, and DN200. Larger sizes DN250 to DN600 are supplied against order with 5 to 7 working days dispatch.
What is the difference between wafer type and lug type butterfly valve?
A wafer type butterfly valve is clamped between two pipeline flanges using through-bolts and cannot be used for dead-end service (one flange removed while the valve is in the line). A lug type butterfly valve has threaded lugs that allow independent bolting to each flange — it can be used for dead-end service and the downstream piping can be removed without disturbing the valve. Wafer type is more compact, lighter, and economical. Lug type is specified when dead-end isolation capability is required.
What is the MOQ and delivery time for CI Teflon seated butterfly valves?
MOQ is 10 Nos per size. Standard sizes DN50 to DN200 are dispatched within 3 to 5 working days from the Ahmedabad warehouse. Larger sizes DN250 to DN600 and gear operated variants may require 5 to 7 working days. WhatsApp or email size, quantity, operation type (manual or gear operated), and delivery location for pricing within 2 hours during business hours.
Can a Teflon seated butterfly valve handle acids and alkalis?
PTFE (Teflon) is one of the most chemically inert seal materials available. It resists virtually all acids (including hydrochloric, sulphuric, nitric up to moderate concentrations), alkalis (sodium hydroxide, potassium hydroxide), salts, solvents, and organic chemicals. The CI body limits use to non-chloride and non-highly-acidic media at ambient temperature. For concentrated hot acids, specify SS body with PTFE seat instead of CI body.
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Instagram — @kelorvalves LinkedIn — Krishna Industries (KELOR) WhatsApp — +91 93135 43530 Email — [email protected]Krishna Industries (KELOR) supplies Cast Iron Teflon Seated Butterfly Valves Wafer Type 150# from verified vendor partners — CI body with PTFE disc and seat for chemical resistance, SS stem for corrosion resistance at the seal area, available DN40 to DN600 with manual lever or gear operation. The PTFE seating provides leak-proof isolation for water, chemical, HVAC, and general industrial piping without the degradation issues of rubber seats. KELOR dispatches from the Ahmedabad warehouse with Pan India coverage, competitive pricing for project BOM orders, and GST-compliant documentation. WhatsApp or email your specifications for pricing within 2 hours during business hours.