Cast Iron Gate Valve (Handwheel Operated) — Class 150# / 300# Supplier in India | KELOR
Krishna Industries (KELOR), based in Ahmedabad, Gujarat, supplies Cast Iron Gate Valves (Handwheel Operated) in Class 150# and Class 300# pressure ratings — flanged end connections — IS 515 / API 600 standards — sizes 1½″ to 24″ — two-piece cast iron body — stainless steel / cast iron gate and stainless steel stem — metal and resilient rubber seat options — water, oil, gas, and industrial piping — from ₹850/piece — MOQ 5 Pcs — Pan India dispatch from Ahmedabad.
GST invoice with HSN 8481 80 90 for all gate valve dispatches. WhatsApp specifications for pricing within 2 hours during business hours.
⚡ Quick Reference
SupplierKrishna Industries (KELOR) — Ahmedabad, Gujarat
Valve TypeCast Iron Gate Valve (Handwheel)
Pressure ClassClass 150# / Class 300#
End ConnectionFlanged (ASME B16.5)
Body MaterialCast Iron
Size Range1½″ to 24″ (DN40 to DN600)
StandardsIS 515 / API 600
MOQ5 Pieces per size/class
📜 On This Page
- Overview — Cast Iron Gate Valve
- How a Gate Valve Works
- Class 150# vs Class 300# Comparison
- Material of Construction
- Standard Dimensions
- Technical Specifications
- Applications in Indian Industries
- Installation Guidelines
- Why Choose KELOR
- Commercial Information
- Related Products
- Frequently Asked Questions
Cast Iron Gate Valve — Overview
Krishna Industries (KELOR) supplies the Cast Iron Gate Valve (Handwheel Operated) — a robust isolation valve designed for fully open or fully closed service in industrial piping systems. Gate valves use a wedge-shaped gate (disc) that lifts vertically out of the flow path when opened, providing minimal pressure drop and unobstructed flow through the valve bore. When closed, the gate wedges tightly against the body seats to provide a seal against the line pressure. These valves are available in Class 150# and Class 300# pressure ratings with flanged end connections conforming to ASME B16.5, and are designed and supplied in accordance with IS 515 and API 600 standards.
The cast iron body provides mechanical strength and rigidity for industrial service environments, while the stainless steel stem ensures corrosion resistance at the packing area. Gate and seat material options include cast iron gate with metal seats for high-temperature and abrasive service, and stainless steel gate with resilient rubber seats for bubble-tight shutoff on water, air, and gas. Handwheel operation is suitable for sizes up to approximately 6 inch (DN150) where the operating torque is manageable by a single operator. For larger sizes or Class 300# pressure ratings, gear operated configurations are also available from KELOR on request. These valves are widely used in water distribution networks, oil and gas pipelines, chemical process plants, HVAC systems, and fire protection lines across Indian industrial facilities.
How a Gate Valve Works
A gate valve operates by lifting a wedge-shaped gate (disc) vertically out of the flow path to open, and lowering it back into the body seats to close. The gate is connected to a threaded stem that passes through the bonnet. When the handwheel is turned, the stem rotates and — depending on the design — either rises with the gate (rising stem) or rotates in place while the gate moves up and down inside the body (non-rising stem). Rising stem gate valves provide a visual indication of the valve position because the stem protrudes above the handwheel when the valve is open. Non-rising stem gate valves are more compact and are preferred where vertical clearance is limited. Gate valves are designed for isolation (on–off) service only — they should not be used for throttling or flow regulation because partial opening causes vibration, erosion of the gate and seats, and premature failure.
1
Handwheel Turned (Open)
Turning the handwheel counter-clockwise rotates the stem, lifting the gate vertically out of the flow path. In rising stem designs, the stem rises above the handwheel indicating the open position.
2
Full Bore Flow
When fully open, the gate is completely retracted into the bonnet cavity. The flow path through the valve is unobstructed, providing minimal pressure drop and full bore flow capacity equal to the pipe diameter.
3
Handwheel Turned (Close)
Turning the handwheel clockwise lowers the gate into the body seats. The wedge-shaped gate presses against both body seats simultaneously, creating a mechanical seal against line pressure.
4
Tight Shutoff
When fully closed, the gate wedges firmly into the seats. The sealing force increases with line pressure, pushing the gate tighter against the seats. This provides bidirectional shutoff in both flow directions.
⚠ Important — Gate Valves Are for On–Off Service Only
Gate valves must only be operated in the fully open or fully closed position. Operating a gate valve in a partially open (throttling) position causes high-velocity flow across the gate edges, resulting in erosion damage to the gate and seat surfaces, vibration of the gate assembly, and premature seal failure. For flow regulation or throttling applications, use a globe valve or control valve instead. If a gate valve must be operated, open or close it fully — never leave it in a mid-stroke position.
Class 150# vs Class 300# Comparison
The pressure class designation (Class 150# or Class 300#) defines the maximum allowable working pressure of the valve at a reference temperature. Class 300# valves have heavier body walls, thicker flanges, larger bolting, and longer face-to-face dimensions compared to Class 150# valves of the same nominal size. Selecting the correct pressure class is essential for safe and reliable operation. Using a Class 150# valve in a Class 300# rated piping system creates a pressure-containing weak point in the line that can lead to leakage or catastrophic failure.
Class 150#
Class 300#
| Parameter | Class 150# | Class 300# |
|---|---|---|
| Max Working Pressure (Ambient) | ~285 PSI (WOG) | ~740 PSI (WOG) |
| Max Working Pressure (200°C) | ~170 PSI | ~495 PSI |
| Body Wall Thickness | Standard (lighter) | Reinforced (heavier) |
| Flange Thickness | ASME B16.5 Class 150 | ASME B16.5 Class 300 |
| Face-to-Face (2″) | 160 mm | 178 mm |
| Face-to-Face (4″) | 229 mm | 292 mm |
| Bolt Circle Diameter | Smaller bolt circle | Larger bolt circle, more bolts |
| Weight | Lighter (lower cost) | Heavier (higher cost) |
| Typical Applications | Water supply, HVAC, fire protection, general industrial piping, low-pressure oil and gas | Steam, high-pressure oil and gas, chemical process, refinery, power plant, high-temperature service |
| Recommendation | Use when design pressure is within Class 150# rating and temperature does not exceed 200°C for continuous service | Use when design pressure exceeds Class 150# rating, for steam above 10 bar, or when specified on the P&ID |
Material of Construction
The cast iron gate valve is a multi-component assembly where each part is selected for its specific function in the valve. The body and bonnet are made of cast iron for mechanical strength and rigidity. The gate and stem are available in stainless steel or cast iron depending on the service conditions. The seat can be metal-to-metal (integral cast iron seat machined into the body) or resilient (elastomeric insert rings such as EPDM or NBR) depending on the required shutoff tightness and operating temperature. The following table details the standard material options supplied by KELOR.
| Component | Material | Notes |
|---|---|---|
| Body | Cast Iron (GG25 / FC250) | Two-piece bolted body construction — provides strength and rigidity for flanged piping — machined flange faces for gasket sealing |
| Bonnet | Cast Iron (GG25 / FC250) | Bolted bonnet with gasket seal — houses the stem packing gland and provides access to internal components for maintenance |
| Gate / Disc | Stainless Steel (SS304/SS316) or Cast Iron | SS gate for corrosion resistance and longer service life — CI gate for economical general-service applications — wedge-shaped for dual seating |
| Seat | Metal (integral CI) or Resilient Rubber (EPDM / NBR) | Metal seats for high-temperature and abrasive service (steam, slurry) — resilient rubber seats for bubble-tight shutoff on water, air, gas at lower temperatures |
| Stem | Stainless Steel (SS410 / SS304) | Stainless steel stem prevents corrosion at the packing area and ensures smooth operation — ACME threads for manual operation |
| Packing | PTFE Graphite / Braided Graphite | PTFE packing for water, oil, and general service — graphite packing for high-temperature steam service |
| Handwheel | Cast Iron / Ductile Iron | Rigid handwheel for manual torque application — sized for comfortable operation by one person on valves up to 6 inch |
💡 Seat Material Selection Guide
For water, air, and gas service at temperatures below 100°C where bubble-tight shutoff is required, specify resilient rubber seats (EPDM or NBR). EPDM is preferred for water and air, while NBR is preferred for oil and petroleum products. For steam, high-temperature oil, and abrasive slurry service where temperature exceeds 100°C, specify metal seats. Metal seats provide longer service life under abrasive and high-temperature conditions but may allow a small amount of leakage compared to resilient seats. Always match the seat material to the service media, temperature, and shutoff requirements.
Standard Dimensions
The following table shows the standard face-to-face dimensions for Cast Iron Gate Valves conforming to ASME B16.10. These dimensions ensure interchangeability between valves from different suppliers. KELOR supplies gate valves with face-to-face dimensions as per ASME B16.10 for both Class 150# and Class 300# ratings. Always verify the required face-to-face dimension against existing piping if the valve is replacing an existing unit in the line.
| Nominal Size | DN | Inch | F2F Class 150# (mm) | F2F Class 300# (mm) |
|---|---|---|---|---|
| 40 | DN40 | 1½″ | 150 | 178 |
| 50 | DN50 | 2″ | 160 | 178 |
| 80 | DN80 | 3″ | 190 | 203 |
| 100 | DN100 | 4″ | 230 | 292 |
| 150 | DN150 | 6″ | 280 | 356 |
| 200 | DN200 | 8″ | 400 | 457 |
| 300 | DN300 | 12″ | 610 | 686 |
| 600 | DN600 | 24″ | 1000 | 1143 |
Technical Specifications
| Parameter | Value |
|---|---|
| Valve Type | Gate Valve — Handwheel Operated |
| Body Material | Cast Iron (GG25 / FC250) |
| Pressure Rating | Class 150# / Class 300# |
| End Connection | Flanged (ASME B16.5) |
| Operation | Handwheel (gear operated available on request) |
| Size Range | 1½″ to 24″ (DN40 to DN600) |
| Design Standard | IS 515 / API 600 |
| Face-to-Face | ASME B16.10 |
| Flange Drilling | ASME B16.5 |
| Media | Water, Oil, Gas, Industrial Piping |
Applications in Indian Industries
Cast iron gate valves are among the most widely used isolation valves in Indian industrial, municipal, and commercial piping systems. Their simple design, reliable sealing, full-bore flow, and economical cost make them the default choice for on–off isolation in piping networks. The following are the primary application sectors where KELOR supplies cast iron gate valves across India.
Water Supply and Distribution
Municipal water treatment plants, distribution mains, pumping stations, and residential/commercial building water supply systems. Resilient rubber seats provide bubble-tight shutoff for zero leakage on potable water lines.
Oil and Gas Pipelines
Crude oil gathering lines, natural gas distribution, refinery process piping, and fuel handling systems. Class 300# valves with metal seats are preferred for higher-pressure oil and gas service where temperature and pressure demand heavier construction.
HVAC and Chilled Water
Heating, ventilation, and air conditioning systems in commercial buildings, hospitals, and industrial facilities. Gate valves isolate chiller circuits, cooling tower lines, and heating loops for maintenance and seasonal changeover.
Fire Protection Systems
Fire hydrant networks, sprinkler system risers, and fire water pump discharge lines. Gate valves provide reliable isolation for section isolation during system maintenance and periodic fire system commissioning.
Chemical Process Plants
Chemical dosing lines, neutralisation circuits, and process piping handling non-aggressive media. Cast iron body with stainless steel trim provides adequate corrosion resistance for many chemical plant applications at moderate temperatures.
Industrial Piping and Utilities
Compressed air systems, cooling water circuits, plant utility lines, and general process isolation. The economical cost of cast iron gate valves makes them ideal for large-diameter utility piping where frequent operation is not required.
Steam and Thermal Systems
Low-pressure saturated steam distribution (up to 10 bar), thermal fluid heating circuits, and condensate return lines. Class 300# valves with graphite packing and metal seats are specified for steam service. Warm-up procedure must be followed to avoid thermal shock to the cast iron body.
Irrigation and Agriculture
Canal outlet valves, lift irrigation scheme pipelines, agricultural water distribution networks, and tube well discharge lines. The economical cost and robust construction of cast iron gate valves suit large-scale irrigation infrastructure across India.
Installation Guidelines
Correct installation of a gate valve is critical for achieving long service life, reliable shutoff, and safe operation. The following guidelines cover the key installation and maintenance practices for cast iron gate valves in industrial piping systems. These recommendations apply to both Class 150# and Class 300# handwheel operated gate valves.
- Verify valve specifications before installation — confirm that the pressure class, size, end connection, and face-to-face dimension match the piping system requirements and the piping specification or P&ID.
- Inspect the valve interior — remove flange protectors and ensure the valve bore is free of debris, packing material, and foreign objects. Blow out or wipe the body cavity clean before installation.
- Install with proper alignment — the valve must be aligned with the piping so that no bending moment or shear load is transmitted to the valve flanges. Use alignment checks before tightening flange bolts.
- Use new gaskets between flange faces — select gasket material compatible with the service media (rubber sheet for water, spiral wound for steam or high-temperature oil). Do not reuse old gaskets.
- Tighten flange bolts in a criss-cross pattern to the specified torque — uneven bolt tightening causes flange leakage, gasket damage, and misalignment of the valve body.
- Operate the valve (open and close) after installation to confirm free operation and check for binding, rubbing, or unusual resistance. A gate valve should turn smoothly from fully closed to fully open.
- Never force the handwheel — if the valve does not turn freely, do not use pipe extensions or cheater bars on the handwheel. Identify the cause (debris, misalignment, damaged threads) and correct it before operating.
- Regular lubrication of the stem — apply compatible lubricant to the stem threads periodically to ensure smooth operation and prevent corrosion at the exposed stem area.
- Packing gland adjustment — if slight stem leakage occurs during service, tighten the packing gland nuts incrementally (one flat at a time) until leakage stops. Over-tightening the packing gland increases operating torque and can damage the stem.
- For steam service — always follow a gradual warm-up procedure: open the bypass valve (if provided) to equalise temperature before opening the gate valve. This prevents thermal shock to the cast iron body.
⚡ Valve Position Indicator
On rising stem gate valves, the stem position above the handwheel indicates whether the valve is open or closed. When the stem is fully raised (visible above the handwheel), the valve is open. When the stem is fully retracted (flush with or below the handwheel), the valve is closed. For non-rising stem gate valves, the handwheel rotation count indicates position — always count turns from fully closed to ensure the valve is fully open or fully closed, especially in large-diameter valves where multiple turns are required.
Why Choose KELOR
🛠
Industrial Valves, Fasteners, Gaskets and Safety Equipment
KELOR sources and supplies a comprehensive range of industrial products — gate valves, butterfly valves, check valves, ball valves, solenoid valves, gaskets, fasteners, and safety equipment — from verified vendors under one roof.
⚡
Pan India Dispatch from Ahmedabad
All gate valve orders are dispatched from the Ahmedabad warehouse via reliable transport networks. Standard sizes in Class 150# are dispatched within 5 to 7 working days. Express dispatch available for urgent project requirements.
💰
Competitive Pricing — From ₹850/Piece
Starting from ₹850/piece for standard sizes in Class 150#. Bulk project pricing, OEM blanket rates, and annual contract pricing available. GST invoice under HSN 8481 80 90 provided with every dispatch.
📦
MOQ 5 Pieces, Project BOM Orders Welcome
Minimum order quantity of 5 pieces per size and pressure class. Project BOM orders combining multiple sizes and specifications are supplied together with one GST invoice and single shipment.
📞
Response Within 2 Hours During Business Hours
WhatsApp your specifications — size, pressure class, end connection, seat type, and quantity — and receive pricing within 2 hours. Technical queries and datasheet requests handled by the KELOR sales team.
👥
Dedicated Sales Support for Every Order
From enquiry to delivery, KELOR provides single-point contact for order tracking, documentation, and after-sales support. Email communication and WhatsApp updates keep you informed at every stage.
Commercial Information
Pricing, Delivery and Terms
Starting Price₹850 / Piece (Class 150#, standard sizes)
Price BasisEx-Ahmedabad Warehouse
Payment TermsAdvance Payment / LC
DeliveryReady Stock / Fast Dispatch
MOQ5 Pieces per size and class
HSN Code8481 80 90
PackagingStandard industrial packing for transport
GST InvoiceProvided with every dispatch
Related Products from KELOR
Need a Quote for Cast Iron Gate Valves?
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✉ Email for QuoteFrequently Asked Questions
What is the difference between Class 150# and Class 300# gate valves?
Class 150# gate valves are rated for a maximum working pressure of approximately 150 PSI at ambient temperature (285 PSI for WOG at ambient). They are used in low-to-medium pressure applications such as water supply, HVAC, and general industrial piping. Class 300# gate valves are rated for approximately 740 PSI WOG at ambient temperature, making them suitable for higher-pressure oil, gas, and steam applications. Class 300# valves have heavier body walls, thicker flanges, and a larger face-to-face dimension compared to Class 150# valves of the same nominal size. For example, a 2 inch Class 150# gate valve has a face-to-face dimension of 160 mm, while a 2 inch Class 300# gate valve is approximately 178 mm. Select Class 150# for water, general service, and low-pressure applications. Select Class 300# for oil, gas, steam, or any application where the design pressure exceeds the Class 150# rating.
Can a cast iron gate valve be used for steam service?
Cast iron gate valves can be used for low-pressure saturated steam (typically up to 10 bar and 180 degree Celsius) when the valve is rated for the required pressure class. However, cast iron is brittle and can crack under thermal shock or sudden temperature changes. For continuous steam service at higher pressures and temperatures, cast steel (ASTM A216 WCB) or forged steel gate valves are the preferred choice because they handle thermal cycling better than cast iron. If cast iron gate valves are used on steam, they should be Class 300# rated, and the warm-up procedure should be followed gradually to avoid thermal shock. Always verify the pressure-temperature rating of the specific valve against the steam operating conditions before installation.
What is the face-to-face dimension for a 4 inch Class 150# gate valve?
The face-to-face dimension for a 4 inch (DN100) Class 150# flanged gate valve as per ASME B16.10 is 229 mm. For a 4 inch Class 300# flanged gate valve, the face-to-face dimension is 292 mm. These dimensions are standardized and ensure interchangeability between manufacturers. KELOR supplies gate valves with face-to-face dimensions conforming to ASME B16.10 for both Class 150# and Class 300# ratings. Always verify dimensions at the time of ordering if the valve must match existing flange-to-flange spacing in the piping system.
What seat materials are available for cast iron gate valves?
Cast iron gate valves are available with two main seat types: metal seats (integral cast iron seat machined into the body) and resilient rubber seats (EPDM, NBR, or Viton insert rings). Metal seats provide longer service life in abrasive or high-temperature service but may not achieve zero leakage on water or gas. Resilient rubber seats provide bubble-tight shutoff on water, air, and gas at low pressures but degrade at higher temperatures (typically limited to 100 to 150 degree Celsius depending on the elastomer). For general water and oil service, resilient rubber seats are preferred for tight shutoff. For steam, high-temperature oil, or abrasive slurry service, metal seats are the appropriate selection.
What is the MOQ and delivery timeline for cast iron gate valves from KELOR?
MOQ is 5 pieces per size and pressure class specification. Project BOM orders combining multiple sizes in a single order are supplied together with one GST invoice under HSN 8481 80 90. Standard sizes from 1½ inch to 6 inch in Class 150# are dispatched within 5 to 7 working days from the Ahmedabad warehouse. Sizes above 6 inch and Class 300# ratings may require 10 to 15 working days depending on stock availability. WhatsApp the size, pressure class, end connection, and quantity for pricing within 2 hours during business hours.
Why should I choose a handwheel operated gate valve over a gear operated one?
Handwheel operated gate valves are the correct choice for sizes up to approximately 6 inch (DN150) where the operating torque is low enough for manual operation by one person. They are simpler, lighter, more compact, and less expensive than gear operated valves. Gear operated gate valves are required for sizes 8 inch and above where the torque needed to open and close the valve exceeds what a human operator can comfortably apply by hand. For Class 300# valves, gear operation may be needed from 4 inch and above due to higher seating forces. Handwheel valves also offer faster operation for frequent cycling, making them suitable for isolation duty in process plants. KELOR supplies both handwheel and gear operated gate valves — specify the operation type, size, and pressure class at the time of enquiry.
Krishna Industries (KELOR) supplies Cast Iron Gate Valves (Handwheel Operated) in Class 150# and Class 300# from Ahmedabad, Gujarat — sizes 1½″ to 24″ — flanged end connections — IS 515 / API 600 — starting from ₹850/piece — MOQ 5 Pcs — Pan India dispatch with GST-compliant documentation. WhatsApp specifications for pricing within 2 hours during business hours.