Grooved Resilient Seated NRS Gate Valve No. Z85X

Grooved Resilient Seated NRS Gate Valve Definition and Components

Fire gate valve Definition & Main Parts

A Grooved Resilient Seated NRS Gate Valve Model No. Z85X is a valve designed for use with grooved piping systems. It uses a mechanical grooved coupling connection instead of flanges or threads, allowing for quick installation and disassembly. The "Z85X" designation indicates: Z=Gate valve, 85=Grooved ends, X=Resilient seated.

Gate Valve NRS​ Main Parts:

• Valve body with integral grooved ends
• Resilient-seated gate
• Non-rising stem assembly
• Handwheel or gear operator
• Groove for coupling housing
• Rubber sealing gasket (for grooved connection)

Role, Characteristics, and Application Scenarios of Grooved Resilient Seated NRS Gate Valve in Pipelines

Functions:

• Quick isolation in grooved piping systems
• Fire protection system control
• Industrial process line shutdown
• HVAC and plumbing system valves

Operational Features:

• Quick installation - uses grooved couplings
• No welding/threading required
• Compact design - shorter face-to-face than flanged
• Easy maintenance - can be removed without pipe cutting
• Bubble-tight seal - resilient seated design

Typical Applications:

• Fire sprinkler systems
• Industrial process water lines
• HVAC chilled/heating water
• Temporary piping systems
• Mining and marine applications

Scenario Diagram:

Grooved Resilient Seated NRS Gate Valve Standards: Materials, Design, and Connections

Material Standards:

• Body: Ductile Iron ASTM A536 or Cast Iron ASTM A126
• Stem: Stainless Steel ASTM A276
• Gate: Ductile Iron with EPDM encapsulation
• Seats: EPDM (standard), Viton (chemical service)

Design Standards:

• UL/FM Standards for fire protection (UL 262, FM 1120)
• AWWA C509 for waterworks (some models)
• MSS SP-68 for high pressure grooved connections
• Pressure ratings: 175 psi, 200 psi, 300 psi common

Connection Standards:

• Groove Standard: ANSI/AWWA C606 (groove dimensions)
• Coupling Compatibility: Designed for standard grooved couplings
• Gasket Type: EPDM/CIIR for fire protection, various for other services
• End Types: Grooved x Grooved (both ends)

How to Select Grooved Resilient Seated NRS Gate Valve

Key Steps:

• Specify Requirements: Size, pressure class, service (fire, water, chemical)
• Verify Standards: UL/FM listing for fire protection, other certs as needed
• Select Supplier: Manufacturers specializing in grooved products
• Order Components: Include required couplings and gaskets
• Review Documentation: Request product listings and installation guides

Critical Specifications:

• Service type (fire protection, HVAC, industrial)
• Pressure rating required
• Temperature range
• Connection size (groove dimensions)
• Required certifications (UL, FM, NSF)

Important Considerations:

• Purchase matching couplings and gaskets
• Verify groove tooling compatibility
• Check installation torque requirements
• Consider future maintenance access

Pre-Shipment Inspection for Export Grooved Resilient Seated NRS Gate Valve and Key Considerations

Documentation Check:

• UL/FM Listing Certificates (for fire service)
• Material Certificates
• Pressure Test Certificates
• Installation Instructions

Physical Inspection:

Groove Dimension Check

Verify groove width and depth

Check groove smoothness and edges

Measure outside diameter at grooves

Pressure Testing

Hydrostatic shell test: 1.5× rated pressure

Seat leakage test: 1.1× rated pressure

Fire test certification if applicable

Operational Test

Smooth handwheel operation

Proper stem packing adjustment

Clear open/close indication

Surface & Coating

Red epoxy coating for fire protection

Proper identification markings

No damage to groove surfaces

Export Packaging:

• Groove protection - plastic or cardboard sleeves
• Thread protection - caps on stem threads
• Separate packaging for coupling kits
• Moisture protection for long sea voyages
• Clear labeling of valve orientation

Key Precautions:

• Groove protection: Critical - damage affects sealing
• Certification documents: Must accompany fire protection valves
• Gasket compatibility: Include correct gaskets for service
• Installation tools: Consider including groove measurement tools
• Climate control: For rubber components in extreme climates

Fire valve Final Documents:

• Commercial Invoice
• Packing List
• Bill of Lading
• Certification Folder (UL/FM/NSF)
• Material Test Reports
• Installation/Maintenance Manual

Grooved Resilient Seated NRS Gate Valve Size Chart