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Grooved OS&Y Gate Valve: What Are the Technical Specifications and UL/FM Requirements for Model Z81 (200 PSI)?

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2026-10-14

Explore technical specifications, features, and procurement details of the Model Z81 200PSI grooved OS&Y gate valve for fire protection systems.

Grooved OS&Y Gate Valve: What Are the Technical Specifications and UL/FM Requirements for Model Z81 (200 PSI)?

FIRE PROTECTION ENGINEERING

Grooved OS&Y Gate Valve: What Are the Technical Specifications and UL/FM Requirements for Model Z81 (200 PSI)?

Explore technical specifications, features, and procurement details of the Model Z81 200PSI grooved OS&Y gate valve for fire protection systems. This guide examines industry-standard configurations and structured engineering requirements.

1. Product Overview

A grooved os&y gate valve is engineered for high-reliability flow isolation in modern industrial piping layouts and fire suppression networks. By utilizing grooved end connections conforming to ANSI/AWWA C606 or metric standards, these valves allow rapid mechanical coupling integration while ensuring secure alignment.

Taking Ningjin APC Industries (Model Z81) as a practical industry example, resilient wedge gate valves feature robust ductile iron structures paired with stable sealing capabilities. The outside screw and yoke configuration positions stem threads externally, granting operators immediate, visual status confirmation.

2. Key Design & Features

Outside Screw & Yoke (OS&Y)

External stem layout enables instant visual monitoring of valve positioning, complete with a tamper-resistant handwheel design for secure operational control.

Resilient Seated Wedge

Ductile iron disc fully encapsulated with premium Epsilon EPDM elastomer, ensuring bubble-tight shutoff and extended cycling durability across intensive operations.

Grooved End Connections

Designed for fast mechanical joining through standard grooved couplings, reducing installation hours while maintaining structural rigidity under pressure.

Straight-Through Flow Path

Unrestricted full-port flow design prevents sediment accumulation, minimizing pressure drop and ensuring consistent hydraulic performance.

3. Common Applications

Fire Sprinkler Networks: Main control valves and standpipe systems in commercial complexes and high-rise developments.
Municipal Water Supply: Dedicated fire water inflow lines, distribution networks, and public utility infrastructures.
Industrial Fire Suppression: Factory facility fire protection loops requiring dependable shutoff performance under pressure.

4. Technical & Certification Reference

For engineering design, project sourcing, and compliance verification, the standard specifications of the Model Z81 series are outlined below:

Technical Parameter	Specification Details
Design & Groove Standard	ANSI/AWWA C606 or Metric Grooved Ends; Face-to-Face per ASME B16.10
Working & Testing Pressure	Max Working Pressure: 200 PSI; Max Testing Pressure: 400 PSI (Per FM 1120/1130, UL 262)
Operating Temperature Range	0 to 80°C / 32 to 176°F
Body & Bonnet Material	Ductile Iron ASTM A536 Grade 65-45-12
Stem & Disc Material	304 Stainless Steel Stem; EPDM Encapsulated Ductile Iron Disc
Global Approvals & Listings	UL Listed, cUL, FM Approved, NSF/ANSI 61 & NSF/ANSI 372 Certified Lead-Free

Engineering Note: When integrating a grooved os&y gate valve into high-pressure fire systems, verify that nominal pipe dimensions and groove dimensions match manufacturer schedules to guarantee sealing integrity.