Grooved Resilient Seated NRS Gate Valve Model No. 1111

Grooved Resilient Seated NRS Gate Valve Model No. 1111 Definition and Components

Definition & Main Parts

A Grooved Resilient Seated NRS Gate Valves Model No. 1111 is a valve specifically designed for fire protection systems using grooved piping connections. The "1111" model number typically indicates it's a fire protection specific valve (often UL/FM approved) with grooved ends.

Main Parts:

• Valve body with precision grooved ends
• Resilient-seated gate (fire-rated design)
• Non-rising stem assembly
• Handwheel with chainwheel option
• UL-listed components throughout
• Factory-applied red epoxy coating

Role, Characteristics, and Application Scenarios of Grooved Resilient Seated NRS Gate Valve Model No. 1111 in Pipelines

Functions:

• Main control valve in fire sprinkler systems
• Sectional isolation in fire protection piping
• Pump discharge/suction valve
• Riser control valve

Operational Features:

• Quick installation with grooved couplings
• UL/FM listed for fire protection service
• Tamper indication provision (for supervisory switches)
• Easy maintenance without pipe cutting
• Supervisory switch mounting capability

Typical Applications:

• Wet pipe sprinkler systems
• Dry pipe valve supply lines
• Fire pump discharge piping
• High-rise building risers
• Industrial fire protection

Scenario Diagram:

Grooved Resilient Seated NRS Gate Valve Model No. 1111 Standards: Materials, Design, and Connections

Material Standards:

• Body: Ductile Iron ASTM A536 Grade 65-45-12
• Stem: Stainless Steel ASTM A276 Type 416
• Gate: Bronze or ductile iron with EPDM
• Coating: Red epoxy (5-8 mils thickness)

Design Standards:

• UL 262 - Standard for Gate Valves for Fire-Protection Service
• FM 1120 - Approval Standard for Valves
• NFPA 13/14/20 - Installation standards compliance
• Pressure rating: 175 psi (standard), 300 psi (high pressure)

Connection Standards:

• Groove Standard: Per manufacturer (Victaulic, Gruvlok, etc.) or ANSI/AWWA C606
• End Types: Grooved x Grooved
• Gaskets: EPDM for standard, CIIR for chemical resistance
• Couplings: Must match groove profile (1-groove, 2-groove styles)

How to Select Grooved Resilient Seated NRS Gate Valve Model No. 1111

Key Steps:

• Verify Requirements: UL listing mandatory, FM approval often required
• Specify Details: Size, pressure class, supervisory switch provisions
• Choose Supplier: UL-listed manufacturers with proven track record
• Order Complete Assembly: Include couplings, gaskets, switches as needed
• Review Certifications: UL/FM labels must be physically on valve

Critical Specifications:

• UL listing number
• FM approval number (if required)
• Groove style compatibility
• Pressure rating (175 psi minimum for sprinklers)
• Tamper switch mounting provisions

Important Notes:

• Purchase from authorized fire protection distributors
• Ensure valve has permanent UL/FM marking
• Consider factory-assembled switch packages
• Verify compatibility with existing grooved systems

Pre-Shipment Inspection for Export Grooved Resilient Seated NRS Gate Valve Model No. 1111 and Key Considerations

Documentation Check:

• UL Listing Certificate copy
• FM Approval Certificate (if applicable)
• Material Certificates (ASTM compliance)
• Factory test reports
• Installation instructions

Physical Inspection:

UL/FM Markings Verification

Permanent marking on valve body

Correct model number

Pressure rating clearly shown

Groove Inspection

Precision groove dimensions

Smooth, undamaged groove surfaces

Proper outside diameter

Pressure Testing

Shell test: 2 × rated pressure (350 psi for 175 psi valve)

Seat test: 1.1 × rated pressure (193 psi for 175 psi valve)

Zero leakage requirement

Fire Protection Specific Checks

Red epoxy coating (complete coverage)

Tamper switch mounting pads/lugs

Handwheel or chainwheel operation

Clear open/close indication

Export Packaging:

• Individual boxing for each valve
• Groove protectors (rigid plastic)
• Desiccant packs in valve cavity
• Separate package for switches/accessories
• Climate-controlled if rubber components included
• UL labels protected from damage

Fire gate valve Key Precautions:

• Certification integrity: UL/FM labels must remain visible
• Rubber components: Protect from ozone/UV exposure
• Documentation: Include compliance certificates in shipment
• Installation parts: Package gaskets separately with part numbers
• Climate considerations: Special packaging for tropical/humid destinations

Fire valve Final Shipping Package:

• Commercial documents (invoice, packing list, B/L)
• Technical folder (certificates, test reports, manuals)
• Valve in protective packaging
• Accessories in labeled separate boxes
• Installation templates/tools if specified

Grooved Resilient Seated NRS Gate Valve Model No. 1111 Size Chart