Knife Gate Valves

Description

Knife Gate Valves

Heavy-Duty Isolation Valves for Slurry, Pulp, and Abrasive Media Applications

Introduction: Industrial-Grade Knife Gate Valves for Demanding Flow Control

In process industries where abrasive slurry, fibrous pulp, viscous fluids, and semi-solid media must be controlled reliably, Knife Gate Valves play a critical role. Designed primarily for isolation service rather than throttling, these valves feature a sharp-edged gate (blade) that cuts through thick media and provides tight shut-off.

At Krishna Industries, Ahmedabad, Gujarat, India, we specialize in manufacturing and supplying high-performance Knife Gate Valves engineered for heavy-duty applications across mining, pulp & paper, wastewater treatment, cement plants, chemical processing, and power industries.

Our Knife Gate Valves are designed with robust body construction, precision-machined seating surfaces, and durable sealing systems to ensure leak-proof isolation under harsh working conditions.

In the industrial valve category, Knife Gate Valves are closely associated with:

• Slurry Valves
• Pulp Valves
• Industrial Gate Valves
• Wafer Type Valves
• Flanged Isolation Valves

These related product types serve similar isolation functions, but Knife Gate Valves are uniquely suited for handling solids-laden and abrasive media where conventional gate valves or butterfly valves may fail prematurely.

What is a Knife Gate Valve?

A Knife Gate Valve is a linear motion valve designed for on/off service in applications involving thick, viscous, or solid-laden fluids. It features:

• A thin, sharp-edged stainless steel gate
• Compact wafer or flanged body design
• Replaceable seats (metal or elastomer)
• Rising or non-rising stem options
• Manual or automated actuation

Unlike conventional wedge gate valves, Knife Gate Valves are optimized for low-pressure, high-solid-content systems.

Technical Overview

1. Construction Features

Body Types:

• Cast Iron
• Ductile Iron
• Carbon Steel
• Stainless Steel (SS304 / SS316 / SS316L)

Gate Material:

• Stainless Steel
• Hardened Steel
• Special coated blades for abrasive applications

Seat Options:

• EPDM
• NBR
• PTFE
• Metal-to-metal seating

Connection Types:

• Wafer Type
• Lug Type
• Flanged Ends (ANSI / DIN / IS)

Pressure Ratings:

• PN10 / PN16
• Class 150

Size Range:

• 50 mm to 600 mm (custom sizes available)

Applications of Knife Gate Valves

Knife Gate Valves are widely used in:

1. Mining & Mineral Processing

Handling of slurry, tailings, abrasive sand mixtures.

2. Pulp & Paper Industry

Control of pulp stock, fiber suspension, and recycled paper slurry.

3. Wastewater Treatment Plants

Sludge lines, raw sewage isolation, dewatering systems.

4. Cement Plants

Cement slurry, fly ash handling systems.

5. Chemical Processing

Corrosive and viscous fluids.

6. Power Plants

Ash handling systems and slurry discharge lines.

Why Knife Gate Valves Are Preferred in Slurry Systems

1. Minimal clogging due to sharp-edged blade
2. Full bore opening for unrestricted flow
3. Compact installation space
4. Cost-effective solution for isolation
5. Easy maintenance and seat replacement

Traditional gate valves often jam in slurry systems, whereas Knife Gate Valves cut through the media effectively.

Types of Knife Gate Valves Supplied by Krishna Industries

1. Manual Knife Gate Valve

Handwheel operated, ideal for low-frequency operation.

2. Pneumatic Actuated Knife Gate Valve

Used in automated systems where remote operation is required.

3. Electric Actuated Knife Gate Valve

Suitable for controlled process environments.

4. Flanged Knife Gate Valve

Used in larger diameter pipeline systems.

5. Wafer Type Knife Gate Valve

Compact design for tight installation spaces.

Key Technical Advantages

• Bi-directional sealing (in specific models)
• Replaceable seat design
• Corrosion-resistant blade options
• Low operating torque
• Heavy-duty yoke construction
• Easy dismantling for maintenance

Manufacturing Strength – Krishna Industries

Krishna Industries is positioned as a trusted Knife Gate Valve supplier in Ahmedabad, Gujarat, India, serving domestic industrial buyers across India.

Our Manufacturing Capabilities:

• CNC machining facility
• Pressure testing as per IS / ANSI standards
• Hydrostatic and seat leakage testing
• Material traceability
• Customized design capability
• Quick delivery support

We supply to industries in Maharashtra, Gujarat, Tamil Nadu, Rajasthan, Madhya Pradesh, and across India.

Minimum Order Quantity (MOQ)

Minimum Order Quantity: 10 Pieces

We focus primarily on bulk supply for Indian industrial buyers. Our MOQ policy ensures production efficiency and competitive pricing for:

• OEMs
• EPC Contractors
• Industrial Plants
• Government Projects
• Large Process Industries

Technical Specifications Table

Quality Assurance & Testing

Each Knife Gate Valve undergoes:

• Shell test
• Seat leakage test
• Visual inspection
• Dimensional verification
• Surface finish check
• Functional operation testing

Our testing ensures zero visible leakage and reliable performance in abrasive environments.

Indian Buyer Focus

Krishna Industries primarily caters to Indian industrial buyers requiring:

• Reliable isolation valves
• Competitive factory pricing
• Bulk quantity supply
• Technical documentation support
• Fast dispatch from Gujarat

We understand Indian industrial standards, tender specifications, and GST-compliant billing processes.

Installation Guidelines

1. Ensure pipeline alignment before installation.
2. Use proper gaskets for flanged connections.
3. Do not use Knife Gate Valves for throttling service.
4. Ensure actuator alignment in automated models.
5. Conduct pressure testing after installation.

Maintenance Recommendations

• Periodic blade cleaning
• Packing gland tightening
• Seat inspection during shutdown
• Lubrication of stem threads
• Replacement of worn elastomer seats

Proper maintenance extends valve life significantly in slurry systems.

Competitive Advantages of Krishna Industries

• Ahmedabad-based manufacturing hub
• Strong vendor network for raw materials
• Technical support before and after sales
• Custom valve design capability
• Transparent pricing structure
• Bulk industrial supply capability

Frequently Asked Questions (FAQ)

1. What is the main purpose of a Knife Gate Valve?

Knife Gate Valves are used for on/off isolation in slurry and solid-laden fluid systems.

2. Can Knife Gate Valves be used for throttling?

No, they are designed primarily for isolation service.

3. What materials are available?

CI, DI, Carbon Steel, Stainless Steel with various seat materials.

4. What is the pressure rating?

Typically PN10 and PN16.

5. What industries use Knife Gate Valves?

Mining, wastewater, cement, pulp & paper, chemical industries.

6. Is automation possible?

Yes, pneumatic and electric actuators are available.

7. What is the MOQ?

Minimum order quantity is 10 pieces.

8. Are customized sizes available?

Yes, custom configurations are available on request.

9. Do you provide testing certificates?

Yes, we provide standard test certificates.

10. Where are you located?

Krishna Industries is based in Ahmedabad, Gujarat, India.

Why Choose Krishna Industries – Ahmedabad, Gujarat, India

When selecting a Knife Gate Valve supplier, industrial buyers require:

• Reliable quality
• On-time delivery
• Proper documentation
• Competitive pricing
• Technical support

Krishna Industries meets these requirements with structured manufacturing, quality control systems, and strong domestic supply networks.

Being located in Ahmedabad, Gujarat — one of India’s leading industrial manufacturing hubs — allows us to serve major industrial zones efficiently.

Conclusion

Knife Gate Valves are critical isolation valves for industries handling slurry, abrasive, and viscous media. Their simple yet robust design makes them highly effective in demanding industrial environments.

Krishna Industries, Ahmedabad, Gujarat, India, is a trusted supplier and manufacturer of Knife Gate Valves for Indian industrial buyers, offering bulk supply (MOQ 10), reliable quality, and competitive pricing.

For technical discussions, bulk requirements, or project supply inquiries, Krishna Industries stands ready to support your industrial valve needs with precision-engineered Knife Gate Valve solutions.