Gate Valve Casting Manufacturer in India
Invent Cast Pvt. Ltd. is a trusted gate valve casting manufacturer in India, specialising in precision investment-cast gate valve bodies and bonnets for global OEMs and industrial buyers. We manufacture gate valve castings in stainless steel, carbon steel, duplex, and super duplex grades, strictly as per drawing, with API 600 / API 6D compliance and full export documentation from our foundry in Rajkot, Gujarat.
- Serving clients across the globe with precision-engineered components.
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- Delivering high-tolerance metal parts with complex geometries and repeatable accuracy.
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- From prototyping to high-volume production, all under one roof.
- ✼
- Serving clients across the globe with precision-engineered components.
- ✼
- Delivering high-tolerance metal parts with complex geometries and repeatable accuracy.
- ✼
- From prototyping to high-volume production, all under one roof.
- ✼
- Serving clients across the globe with precision-engineered components.
- ✼
- Delivering high-tolerance metal parts with complex geometries and repeatable accuracy.
- ✼
- From prototyping to high-volume production, all under one roof.
- ✼
What Is Gate Valve Casting? &
Why Investment Casting Is the Right Method?
A gate valve casting is a precision-manufactured metal component typically the valve body, bonnet, wedge, or flange produced through an industrial casting process. Gate valves are used across oil & gas, water treatment, chemical processing, power generation, and marine industries to provide full-bore isolation with minimal flow resistance when fully open.
Investment casting (also known as lost wax casting) is the most suitable manufacturing method for gate valve bodies because it allows complex internal geometries, tight dimensional tolerances, and excellent surface finish to be achieved in a single pour eliminating the need for extensive machining or welding. At Invent Cast, we use the silica sol investment casting process, which produces gate valve castings with surface roughness as fine as Ra 3.2 µm and dimensional tolerance to ISO 8062 CT6-CT8.
Compared to sand casting or forging, investment cast gate valve bodies offer superior near-net-shape accuracy, reduced material waste, and consistent batch-to-batch repeatability making them the preferred choice for OEMs supplying regulated or safety-critical industries globally.
Why Global OEMs Choose Invent Cast for Gate Valve Castings
With a fully integrated investment casting foundry in Rajkot, Gujarat, Invent Cast delivers gate valve castings that meet the exacting demands of international procurement engineers and quality managers.
- Drawing-based manufacturing - every gate valve casting is produced strictly to customer drawings and specifications, with no assumptions or approximations
- Multi-grade material capability - CF8, CF8M, WCB, LCB, WC6, WC9, duplex (SAF 2205), super duplex (SAF 2507), Monel, Inconel, and more
- API 600 / API 6D / ASTM / ASME / DIN / EN / BS / JIS compliance - full documentation and material traceability provided
- Robotic shelling process - ensures uniform shell thickness and eliminates porosity, critical for pressure-retaining gate valve bodies
- 25–40 day sample lead time - from drawing approval to first article inspection
- Export-ready supply - we serve OEMs in USA, Germany, UK, Italy, the Middle East, and across Asia
- Single-piece job handling up to 300 kg - suitable for large-bore gate valve bodies
These advantages make investment casting the preferred route for valve casting manufacturers producing high-performance and high-volume valve components for global markets.
Our Gate Valve Casting Range
Industries We Serve with Gate Valve Investment Castings
Our gate valve castings are engineered for reliable performance in demanding environments across multiple industries:
Oil & Gas
Gate valve castings for upstream, midstream, and downstream oil & gas applications including pipeline isolation, wellhead control, and refinery processes. We supply API 600 and API 6D compliant gate valve bodies in WCB, CF8M, and duplex grades rated for high-pressure, high-temperature service.
Chemical & Petrochemical Processing
Corrosion-resistant gate valve body castings in CF8M, super duplex, and Hastelloy-grade alloys for aggressive chemical environments. Each casting is tested for hydrostatic pressure and chemical resistance to ensure zero-leakage performance.
Water Treatment & Municipal Supply
Precision gate valve castings for water distribution networks, municipal pipelines, and water treatment plants. Our castings provide leak-proof sealing, full-bore flow, and long service life in both potable and industrial water systems.
Power Generation
Gate valve castings for steam isolation, boiler feed, and cooling water systems in thermal and nuclear power plants. We manufacture to ASME B16.34 and DIN standards with full heat treatment and NDT documentation.
Pharmaceuticals & Food Processing
Hygienic-grade stainless steel gate valve castings with electropolished internal surfaces for pharmaceutical and food-grade applications. Smooth internal geometry ensures no dead zones and easy CIP/SIP cleaning.
HVAC & Building Services
Cost-effective CF8 and WCB gate valve castings for large-scale HVAC, heating, and commercial plumbing systems, available in ANSI Class 150–300.
Marine & Offshore
Sea-water resistant gate valve body castings in duplex stainless steel and bronze for offshore platforms, ships, and marine pipeline systems. Compliant with DNV, Lloyd’s, and Bureau Veritas requirements.
| Gate Valve Casting Technical Data | |
|---|---|
| R&D | |
| Lead Time for Development & Samples: 25–40 days | |
| Molten Metal | Stainless Steel: CF8, CF8M, Duplex, Super Duplex |
| Carbon Steel: WCB, LCB | |
| Alloys: Aluminium Alloy, Bronze, Nickel-base Alloy, Copper Alloy | |
| Metal Standard | ASTM, ASME, API, DIN, EN, BS, JIS |
| Material for Shell Building | Silica Sol (Precipitated Silica) |
| Water Glass (Sodium Silicate) | |
| Mixtures of Silica Sol and Water Glass | |
| Technical Parameter | Piece Weight: 1 kg to 300 kg |
| Max Dimension: 1,800 mm (Diameter or Length) | |
| Min Wall Thickness: 4–6 mm (depending on pressure class) | |
| Casting Surface Roughness: Ra 3.2–6.3 μm, Machined Surface Roughness: Ra 1.6 μm | |
| Tolerance of Casting: ISO 8062 CT6–CT8 | |
| Tolerance of Machining: ISO 2768-mk / IT6 | |
| Inner Core: Ceramic Core, Urea Core, Water-Soluble Wax Core | |
| Pressure Class: ANSI Class 150–900 (customizable) | |
| Heat Treatment | Normalizing, Quenching & Tempering, Solution Annealing, Stress Relieving |
| Surface Treatment | Polishing, Sand/Shot Blasting, Electropolishing, Pickling & Passivation, Epoxy Coating, PTFE Coating, Anodizing |
| Dimension Testing | CMM, Vernier Caliper, Depth Gauge, Height Gauge, Go/No-Go Gauge, Special Fixtures |
| Chemical Inspection | Chemical Composition Analysis (20+ elements), X-ray Radiography, Cleanliness Inspection, Carbon-Sulfur Analysis |
| Physical Inspection | Hardness, Yield Strength, Tensile Strength, Elongation, Impact Testing, Dynamic & Static Balancing, Microstructure Analysis |
| Testing & Compliance | Hydrostatic Testing, Air Tightness, Gate Operation & Seat Function Testing, API/ISO Compliance, Fugitive Emission Testing (if applicable) |
| Production Capacity | Up to 150 tons/month, over 1,800 tons annually |
| Applications | Oil & Gas, Chemical Processing, Water Treatment, HVAC, Pharmaceutical, Marine Industries |
Our Gate Valve Casting Manufacturing Process
At Invent Cast, every gate valve body casting passes through a controlled, step-by-step investment casting process designed for zero-defect output:
Wax Pattern & Assembly
Precision wax patterns are injected using high-accuracy metal dies, ensuring consistent gate valve body geometry across every batch. Patterns are assembled on a wax runner system (tree) for efficient cluster casting.
Robotic Shell Building
Our automated robotic shelling system applies multiple layers of silica sol ceramic slurry and stucco to the wax cluster. Robotic control ensures uniform shell thickness on all gate valve body surfaces including internal bores and flanges eliminating the risk of shell cracks during dewaxing.
Dewaxing & Firing
Wax is removed through autoclave dewaxing and the ceramic shell is fired at high temperature to achieve the strength and permeability required for precision metal pouring.
Melting & Controlled Pouring
Metal is melted in an induction furnace and chemically verified before pouring. Controlled pouring temperature and speed minimises porosity, shrinkage, and oxide inclusions in the gate valve casting.
Shell Removal & Cleaning
After solidification, the ceramic shell is removed by vibration and shot blasting. Gate valve castings are cut from the tree, dressed, and prepared for heat treatment.
Heat Treatment
Depending on material and application, gate valve castings undergo normalising, solution annealing, quenching & tempering, or stress relieving enhancing hardness, tensile strength, and corrosion resistance.
Precision Machining
CNC machining of flanges, bores, seats, and mating surfaces to tight tolerances (ISO 2768-mk / IT6). Sealing surfaces are machined to Ra 1.6 µm for leak-proof gate valve performance.
Inspection & Testing
100% visual, dimensional, and NDT inspection before dispatch. Includes CMM measurement, hydrostatic testing, X-ray, and dye penetrant inspection as required.
Quality Testing & Compliance for Gate Valve Castings
Every gate valve casting from Invent Cast is subject to rigorous quality control at each stage of manufacturing. Our inspection and testing capabilities include:
Dimensional Inspection
CMM (Coordinate Measuring Machine), vernier calipers, depth gauges, height gauges, go/no-go gauges, and special fixtures ensuring flange faces, bore diameters, wall thickness, and seating surfaces all conform to drawing tolerances.
Non-Destructive Testing (NDT)
Dye Penetrant Testing (DPT), Ultrasonic Testing (UT), and X-ray Radiography detecting surface cracks, internal porosity, shrinkage cavities, and inclusions invisible to the naked eye.
Chemical Composition Analysis
Spectroscopic analysis of 20+ elements for every melt batch, with material test certificates (MTC) traceable to the heat number. Carbon-sulfur analysis available on request.
Mechanical Property Testing
Hardness (Brinell/Rockwell), tensile strength, yield strength, elongation, impact testing (Charpy), and microstructure analysis ensuring the gate valve casting meets the metallurgical requirements of the intended service.
Pressure & Functional Testing
Hydrostatic shell and seat testing, air tightness testing, and gate operation & seating function testing per API 598, API 600, and customer-specific test protocols.
Standards We Comply With
- API 600 / API 623 – Bolted Bonnet Steel Gate Valves
- ASTM A216 Gr. WCB / ASTM A351 Gr. CF8, CF8M
- ASME B16.34 – Valves Flanged, Threaded, and Welding End
- DIN EN 1984 – Industrial Valves – Steel Gate Valves
- BS 1414 – Gate Valves for Petroleum & Natural Gas Industries
- JIS B2071 – Cast Steel Gate Valves
- Serving clients across the globe with precision-engineered components.
- ✼
- Delivering high-tolerance metal parts with complex geometries and repeatable accuracy.
- ✼
- From prototyping to high-volume production, all under one roof.
- ✼
- Serving clients across the globe with precision-engineered components.
- ✼
- Delivering high-tolerance metal parts with complex geometries and repeatable accuracy.
- ✼
- From prototyping to high-volume production, all under one roof.
- ✼
- Serving clients across the globe with precision-engineered components.
- ✼
- Delivering high-tolerance metal parts with complex geometries and repeatable accuracy.
- ✼
- From prototyping to high-volume production, all under one roof.
- ✼
Gate Valve Casting
Frequently Asked Questions
We cast gate valve bodies and bonnets in a wide range of materials including stainless steel grades CF8, CF8M, CF3, CF3M; carbon steel WCB and LCB; alloy steel WC6 and WC9; and special alloys including duplex SAF 2205, super duplex SAF 2507, Monel, and Inconel. Material selection is based on your pressure class, temperature range, and fluid media.
We do not have a fixed MOQ. We support both prototype/sample quantities (5–20 pieces) and high-volume production runs (1,000+ pieces per month). Lead time for samples is 25–40 days from drawing approval.
We supply gate valve castings in three states: as-cast (raw), semi-machined (flanges and bores only), and fully machined to final drawing dimensions. We have in-house CNC machining capability and can deliver components ready for assembly.
Yes. Our gate valve body castings are manufactured to comply with API 600 and API 6D standards. We provide full material test certificates (MTC), hydrostatic test reports, dimensional inspection reports, and NDT reports with every shipment.
We manufacture gate valve castings in ANSI Class 150, 300, 600, and 900 as standard. Higher pressure classes (Class 1500 and 2500) are available on request, depending on wall thickness and material grade.
Invent Cast delivers precision-engineered components through advanced investment casting, forging, and sand casting—serving critical industries with unmatched reliability.
