8 ZW205 RELIEF/SUSTA FIRE VLV ANG BODY ANSI 150 FLG SS SEAT CPR TUBNG BRZ FTNGS

Item Number: 8-ZW205FPA
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$22,555.89
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Valve Size: 8 inch
  • Body Style: Angle, ANSI Class 150 Flanged
  • Function: Pressure Relief / Pressure Sustaining
  • Main Valve Body: Ductile Iron ASTM A536
  • Seat Material: Stainless Steel
  • Standard Pilot Spring Range: 50-200 psi
  • Coating: Blue Epoxy, FDA Approved
  • Certifications: ANSI/AWWA C530, NSF/ANSI/CAN 61

Description

The Zurn Wilkins Model ZW205 is an 8-inch pilot operated pressure relief and pressure sustaining valve, designed for critical applications requiring consistent upstream pressure. It precisely modulates to relieve excess pressure or sustain pressure, maintaining stability. This valve features a durable ductile iron body, stainless steel seat, and a blue epoxy coating. Standard components include a pilot assembly with wye strainer, isolation valves, and an inlet pressure gauge. Certified to NSF/ANSI/CAN 61 and ANSI/AWWA C530, it ensures reliable performance and compliance for potable water systems. Item number 8-ZW205FPA.

Help Me Connect

Installation Orientation

  • The recommended installation orientation for this automatic control valve (ACV) is horizontal, with the valve cover up.
  • For 6-inch and larger valves (including this 8-inch model), horizontal installation with the valve cover up is crucial to properly bleed air out of the cover and facilitate maintenance.
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Additional Details

The Zurn Wilkins Model ZW205 is an 8-inch pilot operated pressure relief and pressure sustaining valve designed for applications where it is critical to maintain a predetermined upstream pressure.

This valve modulates between closed and open positions to relieve excess pressure when it exceeds the set point, or sustain pressure when it falls below the set point, ensuring stable system pressure.

Key Features

  • Functions as both a pressure relief and pressure sustaining valve.
  • Blue epoxy coated finish is FDA approved for enhanced durability and corrosion resistance.
  • Includes a pilot assembly with a "Wye" Type Strainer, Closing Speed Control, and Isolation Valves for ease of maintenance and reliable operation.
  • Features an Inlet Pressure Gauge, copper tubing, and brass fittings as standard.

Construction Materials

  • Main Valve Body and Bonnet: Ductile Iron ASTM A536
  • Disc Guide, Seat, Stem, and Spring: Stainless Steel
  • Disc: Buna-N Rubber
  • Diaphragm: Nylon Reinforced Buna-N

Standards & Certifications

  • Complies with ANSI/AWWA C530.
  • Meets the requirements of NSF/ANSI/CAN 61* for potable water (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT).

Caution: For 6-inch and larger valves, the recommended installation orientation is horizontal with the valve cover up to ensure proper air bleeding and maintenance.

Specifications

  • Model: ZW205
  • Valve Size: 8 inch
  • Body Style: Angle Style Body
  • End Connections: ANSI Class 150 Flanged
  • Valve Function: Pressure Relief / Pressure Sustaining
  • Main Valve Body Material: Ductile Iron ASTM A536
  • Main Valve Bonnet Material: Ductile Iron ASTM A536
  • Disc Guide Material: Stainless Steel
  • Seat Material: Stainless Steel
  • Disc Material: Buna-N Rubber
  • Diaphragm Material: Nylon Reinforced Buna-N
  • Stem Material: Stainless Steel
  • Spring Material: Stainless Steel
  • Coating: Blue Epoxy Coated, FDA Approved
  • Tubing Material: Copper
  • Fittings Material: Brass
  • Pilot Spring Range (Standard): 50-200 psi
  • Minimum Inlet Pressure: 10 psi
  • Water Temperature Range: 33°F to 140°F

Certificates & Approvals

  • ANSI/AWWA C530
  • NSF/ANSI/CAN 61* (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

FAQs

What is the primary function of the Zurn Wilkins Model ZW205 valve?

The Zurn Wilkins Model ZW205 functions as both a pressure relief valve and a pressure sustaining valve. It is designed to maintain a predetermined upstream pressure by relieving excess pressure or sustaining it when it drops below the set point.

What are the main body materials used in this valve?

The main valve body and bonnet are constructed from Ductile Iron ASTM A536. Internal components like the disc guide, seat, stem, and spring are made of stainless steel, with a Buna-N rubber disc and nylon reinforced Buna-N diaphragm.

What certifications does the ZW205 valve hold?

The Zurn Wilkins ZW205 valve complies with ANSI/AWWA C530 and meets the requirements of NSF/ANSI/CAN 61*, indicating suitability for potable water applications with a maximum of 0.25% weighted average lead content.

What is the standard pilot spring range for this valve?

The standard pilot spring range for the ZW205 valve is 50-200 psi. Other pilot spring ranges are available to suit various application pressure requirements.

How should this 8-inch valve be installed?

For 6-inch and larger valves, including this 8-inch model, the recommended installation orientation is horizontal with the valve cover facing upwards. This ensures proper air bleeding and simplifies future maintenance.

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