NPS 8" Class 150 LUG Non-Rising Stem Unidirectional Knife Gate Valve - CF8
NPS 8" Class 150 LUG Non-Rising Stem Unidirectional Knife Gate Valve - CF8 - Image 2
NPS 8" Class 150 LUG Non-Rising Stem Unidirectional Knife Gate Valve - CF8 - Image 3
NPS 8" Class 150 LUG Non-Rising Stem Unidirectional Knife Gate Valve - CF8 - Image 4
NPS 8" Class 150 LUG Non-Rising Stem Unidirectional Knife Gate Valve - CF8 - Image 5
NPS 8" Class 150 LUG Non-Rising Stem Unidirectional Knife Gate Valve - CF8 - Image 6

NPS 8″ Class 150 LUG Non-Rising Stem Unidirectional Knife Gate Valve – CF8

Technical Specifications
Size NPS 8"
Pressure Class Class 150
Body Material CF8
Connection End LUG
SKU: KGV-NR-150-CF8-8-LUG Category: Tags: , , , , , , ,

Description

The NPS 8″ Class 150 LUG Non-Rising Stem Unidirectional Knife Gate Valve is a heavy-duty industrial isolation valve engineered by XIAMEN GUTE VALVE MANUFACTURING COMPANY. Built from austenitic stainless steel for superior pitting resistance and immunity to chemical corrosion, this valve features a beveled shearing knife edge and a pocketless full-port bore. It is designed to cleanly slice through fibrous pulp, municipal sewage, and abrasive mineral slurries without clogging or solid accumulation.

Engineering Configuration

NPS 8″ | Class 150 | Unidirectional Knife Gate Valve | CF8 | LUG Ends | Non-Rising Stem

  • Face-to-Face Length (L): 62 mm (EN 558 Series 20 / MSS SP-81)
  • Net Weight: 105 kg
  • Stem Configuration: Non-Rising Stem
  • Sealing Performance: API 598 Rate A Soft Seat / MSS SP-81 Metal Seat
  • Top Flange: ISO 5211 Standard Actuator Mounting Pad

Trim & Metallurgy Customization

  • Blade Shearing Edge: Precision ground beveled stainless steel knife gate (SS304 / SS316 / Duplex 2205) optimized for high-density fiber cutting.
  • Seat Options: Resilient EPDM, NBR, Viton, PTFE, or Stellite hardfaced metal seats for high-temperature ash and dry bulk powder service.
  • Actuation Flexibility: Configurable with Handwheel, Bevel Gearbox (recommended for DN250+), Double-Acting Pneumatic Cylinder, Electric Actuator, Hydraulic Cylinder, or Quick Lever.

Rigorous Quality Assurance

  • 1. Material Spectro Analysis: 100% PMI verification on all pressure-retaining body castings and gate blades.
  • 2. MSS SP-81 Shell Hydrostatic Test: Tested at 1.5x rated working pressure with zero allowable body wall leakage.
  • 3. API 598 Seat Leakage Test: 1.1x hydrostatic seat testing ensuring zero bubble/drop leakage for soft seats or <= 40 ml/min/inch for metal seats.
  • 4. Actuation Cycling Test: 100% factory stroking and limit switch verification under simulated shop air pressure.

Frequently Asked Technical Questions

Q: Why is the full rubber-lined series recommended for abrasive applications?

A: The split-body design is fully lined with heavy-duty replaceable elastomer sleeves that completely isolate the metal body from high-velocity abrasive mineral slurries and tailings.

Q: What advantages does the pocketless full-port design offer?

A: Conventional wedge gate valves feature a bottom cavity that traps grit. Gute Knife Gate Valves utilize a smooth, cavity-free internal bore that eliminates dead pockets and prevents solid sedimentation.

Need Technical Assistance or Custom Sizing?

Proven in Severe Service: See how Gute's engineered flow equipment operates in major global applications in our Industrial Project References or explore technical selection criteria and material standards in our Technical Knowledge Base.

Additional information

Material

Pressure

Valve Size

Connection

Design Standard

ASME Standard
Size

NPS 8"
Pressure Class

Class 150
Body Material

CF8
End Connection

LUG
Operation

Non-Rising Stem Handwheel
Design Structure

Non-Rising Stem + Bi/Unidirectional Gate
Manufacturer

XIAMEN GUTE VALVE MANUFACTURING COMPANY
Trim / Internals

Beveled Knife Blade + Resilient/Metal Seat

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