DN50 knife gate valve (2 inch)
The DN50 knife gate valve delivers exceptional performance in compact 2-inch pipeline systems. Engineered for precision applications including sampling lines, pilot systems, and process control, this valve combines the superior cutting action of larger knife gates with space-efficient design perfect for instrumentation and critical small-bore applications.
Key Applications: Sampling Systems • Chemical Processing • Water Treatment • HVAC • Laboratory Systems • Instrumentation
Why Choose DN50 Knife Gate Valve?
✓ Compact Excellence
- Space-efficient 2-inch design for tight installations
- Full bore flow path maintains maximum capacity
- Lightweight construction reduces pipeline stress
✓ Precision Engineering
- CNC-machined components for smooth operation
- Bubble-tight sealing with zero leakage performance
- Superior cutting action through settled solids and fibrous materials
✓ Versatile Configuration
- Wafer Type: 48mm face-to-face, ideal for retrofits
- Lug Type: Independent mounting, perfect for dead-end service
- Flanged Type: 65mm face-to-face, maximum strength for high pressure
✓ Material Excellence
- Stainless steel construction (304/316/316L)
- Multiple seat options: EPDM, PTFE, Metal seated
- Corrosion-resistant components for aggressive media
Technical Specifications
| Parameter | Specification |
|---|---|
| Nominal Size | DN50 (2 inches) |
| Pressure Rating | PN6/10/16/25, ANSI 150/300 |
| Working Pressure | Up to 16 Bar (232 PSI) |
| Temperature Range | -29°C to +425°C |
| Cv Value | 110 (full open) |
| Body Materials | WCB, CF8, CF8M, CF3M |
| Standards | MSS SP-81, API 6D, ASME B16.5 |
| End Connections | RF, FF, RTJ |
Configuration Options & Dimensions
Wafer Type DN50
- Face-to-Face: 48mm
- Weight: 8-12 kg
- Best For: Retrofit applications, space-saving
Lug Type DN50
- Face-to-Face: 48mm
- Weight: 10-15 kg
- Best For: Dead-end service, easy maintenance
Flanged Type DN50
- Face-to-Face: 65mm
- Weight: 15-25 kg
- Best For: High pressure, critical applications
Performance Data
| Performance Parameter | Value |
|---|---|
| Maximum Flow Rate (Water) | 180 m³/h |
| Pressure Drop (Full Open) | 0.1 Bar |
| Operating Torque | 25-45 Nm |
| Closing Time (Manual) | 15-20 seconds |
| Cycle Life | 10,000+ cycles |
| Leakage Rate | Zero (Class VI) |
Application Solutions
Process Control Systems
- Sample line isolation valves
- Pilot system controls
- Bypass line regulation
- Emergency shutdown systems
Water & Wastewater Treatment
- Chemical dosing systems
- Sampling point isolation
- Small bore transfer lines
- Instrumentation isolation
Chemical Processing
- Reactor sampling lines
- Catalyst transfer systems
- Laboratory connections
- Process monitoring lines
HVAC & Building Services
- Heating system isolation
- Cooling water circuits
- Equipment isolation
- Utility line control
Actuation Options
Manual Operation
- Standard handwheel
- Extended stem for buried service
- Gear drive for high torque applications
Automated Operation
- Pneumatic: Single/double acting with position feedback
- Electric: Multi-turn actuators with local/remote control
- Smart Features: Position indicators, limit switches, SCADA integration
Material Options
Body Materials
- WCB: Carbon steel for general service
- CF8: 304 stainless steel for corrosive environments
- CF8M: 316 stainless steel for enhanced corrosion resistance
Seat Options
- EPDM: General service, water applications (-20°C to +120°C)
- PTFE: Universal chemical resistance (-200°C to +260°C)
- Metal Seated: Stellite overlay for high temperature/abrasive service
Special Materials
- Duplex 2205: For severe corrosive environments
- Hastelloy: For extreme chemical compatibility
- Custom alloys available upon request
Quality Assurance
Testing Standards
- Hydrostatic shell test at 1.5× working pressure
- Seat leakage test per MSS SP-81 Class VI
- Operating torque verification
- Material certification with full traceability
Certifications
- ISO 9001 Quality Management
- PED (Pressure Equipment Directive) compliance
- CE marking for European markets
- Custom certifications available
Installation & Maintenance
Installation Requirements
- Minimum straight pipe: 5D upstream, 2D downstream
- Support valve independently for flanged types
- Allow clearance for stem extension during operation
Maintenance Benefits
- Field-replaceable seats and packing
- No special tools required for service
- Accessible components reduce downtime
- Comprehensive spare parts support
Recommended Spare Parts
- Seat and gasket kit
- Packing set
- Bolting kit
- Operating manual and drawings
Competitive Advantages
🔧 Precision Engineering – CNC machined components ensure consistent performance
📏 Compact Design – Minimal space requirements for installation
🔄 Versatile Mounting – Multiple body configurations for any application
⚡ Easy Service – Field-replaceable components reduce downtime
🌍 Global Standards – Compliance with international design standards
📦 Fast Delivery – Standard DN50 configurations available from stock
Get Your DN50 Solution Today
Ready to optimize your 2-inch pipeline systems? Contact our technical team for expert consultation and competitive quotation on DN50 knife gate valves tailored to your specific requirements.
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