8 ZW205 FIRE PUMP RELIEF VALVE, CLASS 300, FLG X FLG

Item Number: 8-ZW205FPY
1 1
$23,274.43
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Valve Type: Pilot Operated Pressure Relief / Pressure Sustaining
  • Nominal Size: 8 inch
  • End Connections: Class 300 Flanged
  • Body Material: Ductile Iron ASTM A536
  • Standard Pilot Spring Range: 50-200 PSI
  • Certifications: NSF/ANSI/CAN 61, ANSI/AWWA C530, Lead Free
  • Coating: Blue Epoxy Coated, FDA Approved
  • Approximate Weight: 720 lbs

Description

The Zurn Wilkins Model ZW205 is an 8-inch pilot-operated pressure relief and pressure sustaining valve with Class 300 flanged connections. Constructed with a ductile iron body and stainless steel internals, it is designed for critical fire pump applications where maintaining a predetermined upstream pressure is essential or where excess pressure needs to be relieved. This valve is NSF/ANSI/CAN 61 certified, lead-free, and features a durable blue epoxy coating. Standard components include a wye strainer, isolation valves, and an inlet pressure gauge, ensuring reliable performance and ease of maintenance.

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, horizontal installation with the cover up is crucial to prevent difficulties in properly bleeding air out of the cover and performing maintenance if installed vertically.

Connection Type

  • This valve utilizes Class 300 Flanged end connections for secure integration into your piping system.

Functionality

  • The pilot system senses upstream pressure and modulates the main valve to either relieve excess pressure or sustain a desired pressure.
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Additional Details

The Zurn Wilkins Model ZW205 is a pilot-operated pressure relief and pressure sustaining valve, specifically designed for applications where maintaining a predetermined upstream pressure is critical, such as in fire pump systems. This valve precisely modulates to relieve excess pressure or sustain a desired upstream set pressure.

Application & Function

  • Designed to maintain a pre-determined upstream pressure, modulating between closed and open positions.
  • Opens to relieve excess pressure when upstream pressure exceeds the pilot assembly's set point.
  • Can serve as both a pressure relief and pressure sustaining valve.

Construction Materials

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

Standard Features

  • Blue Epoxy Coated, FDA Approved
  • Pilot Assembly includes:
    • "Wye" Type Strainer
    • Closing Speed Control (for sizes 1 1/4" - 4")
    • Isolation Valves
  • Inlet Pressure Gauge
  • ANSI Class 150 Flanges
  • Copper Tubing and Brass Fittings

Specifications

  • Model: ZW205
  • Valve Type: Pilot Operated Pressure Relief / Pressure Sustaining Valve
  • Nominal Size: 8 inch
  • End Connection: Flanged
  • Flange Class: Class 300
  • Body Style: Full Port Globe
  • Body Material: Ductile Iron ASTM A536
  • 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
  • Minimum Inlet Pressure: 10 PSI
  • Temperature Rating: Water 33°F to 140°F
  • Standard Pilot Spring Range: 50-200 PSI
  • Approximate Weight: 720 lbs

Certificates & Approvals

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

Dimensions (8 inch Full Port Globe Style)

  • Dimension A: 26 7/16 inches
  • Dimension B: 20 1/8 inches
  • Dimension C: 15 9/16 inches
  • Dimension D: 8 3/4 inches
  • Dimension E: 1 inch
  • Dimension F: 1 inch
  • Dimension G: 1 inch
  • Dimension H: 13 1/4 inches
  • Dimension J: 9 5/16 inches
  • Valve Stem Internal Thread: 3/8-16
  • Stem Travel: 2 13/16 inches

FAQs

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

The primary function of the Zurn Wilkins Model ZW205 is to act as both a pressure relief and a pressure sustaining valve. It maintains a predetermined upstream pressure by modulating between closed and open positions and relieves excess pressure when necessary.

What are the main end connection types for this 8-inch valve (SKU: 8-ZW205FPY)?

This specific 8-inch ZW205 valve (SKU: 8-ZW205FPY) is equipped with Class 300 Flanged end connections. The ZW205 series generally offers flanged, threaded, and grooved connections.

What materials are used for the main valve body and disc?

The main valve body is constructed from Ductile Iron ASTM A536. The disc is made from Buna-N Rubber, while other internal components like the disc guide, seat, stem, and spring are stainless steel.

What certifications does the Zurn Wilkins Model ZW205 meet?

The Zurn Wilkins Model ZW205 meets ANSI/AWWA C530 standards and is certified to NSF/ANSI/CAN 61, ensuring it is lead-free with a maximum weighted average lead content of 0.25%.

What is the standard pilot spring range for the ZW205?

The standard pilot spring range for the ZW205 Pressure Relief / Pressure Sustaining Valve is 50-200 PSI. Other pilot spring ranges are available as options.

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