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

Item Number: 10-ZW205FPY
1 1
$36,498.80
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Brand - Wilkins
  • Zurn Wilkins Model ZW205 Pilot Operated Pressure Relief / Pressure Sustaining Valve
  • Nominal Size: 10 inch
  • Connection Type: Class 300 Flanged
  • Maximum Operating Pressure: 400 psi
  • Pilot Spring Range: 50-200 psi
  • Body Material: Ductile Iron ASTM A536
  • NSF/ANSI/CAN 61 Certified
  • Lead Free Construction

Description

The Zurn Wilkins Model ZW205 is a 10-inch pilot-operated pressure relief and pressure sustaining valve, designed for applications requiring precise upstream pressure control. It can relieve excess pressure or sustain a pre-determined upstream pressure. This Class 300 flanged valve features a robust Ductile Iron ASTM A536 body, Buna-N rubber disc, and stainless steel internal components. It is NSF/ANSI/CAN 61 certified and Lead Free, ensuring high quality and safety. Standard features include an epoxy coating, wye strainer, isolation valves, and a pilot assembly with a 50-200 psi spring range, offering reliable performance for industrial fire pump systems.

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Connections

  • This 10-inch ZW205 valve features Class 300 flanged end connections.
  • It is designed for direct installation into piping systems with matching 10-inch Class 300 flanges.
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Additional Details

The Zurn Wilkins Model ZW205 Pilot Operated Pressure Relief / Pressure Sustaining Valve is designed for applications where it is critical to maintain a pre-determined upstream pressure. This valve modulates between closed and open positions to maintain a desired upstream set pressure by relieving excess pressure or sustaining it.

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 for durability and compliance.
  • Includes a Pilot Assembly with "Wye" Type Strainer, Closing Speed Control (for sizes 1 1/4" - 4"), and Isolation Valves.
  • Equipped with an Inlet Pressure Gauge.
  • Features Copper Tubing and Brass Fittings.
  • Standard relief range is 50 to 200 psi, with other ranges available.

Installation Note: 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

Valve Characteristics

  • Nominal Size: 10 inch
  • Connection Type: Class 300 Flanged
  • Maximum Operating Pressure (Flanged Class 300): 400 psi
  • Temperature Rating: Water 33°F to 140°F
  • Pilot Spring Range: 50-200 psi
  • Minimum Inlet Pressure: 10 psi
  • Valve Body Style: Globe or Angle

Materials of Construction

  • 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

Certificates & Approvals

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

Dimensions (Full Port, 10 inch, Class 300 Flanged)

  • Overall Length (Dim A): 31 1/8 inches
  • Diameter (Dim B): 23 11/16 inches
  • Maximum Height (Dim C): 17 5/8 inches
  • Flange Diameter (Dim D): 8 3/4 inches
  • NPT Body Tap (Dim E): 1 inch
  • NPT Cover Plug Tap (Dim F): 1 inch
  • NPT Cover Tap (Dim G): 1 inch
  • Flange to Flange Width (Dim H): 13 1/4 inches
  • Flange Edge to Bonnet Top (Dim J): 9 5/16 inches
  • Valve Stem Internal Thread: 3/8-16
  • Stem Travel: 2 13/16 inches
  • Approximate Weight: 720 lbs

FAQs

What is the primary function of the ZW205 valve?

The Zurn Wilkins ZW205 is a pilot-operated valve designed to either relieve excess upstream pressure or sustain a pre-determined upstream pressure in a system, making it suitable for critical pressure control applications.

What are the key material components of the ZW205 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 from Stainless Steel, with a Buna-N rubber disc and nylon-reinforced Buna-N diaphragm.

What is the maximum operating pressure for this 10-inch Class 300 flanged valve?

This specific 10-inch ZW205 valve with Class 300 flanged connections is rated for a maximum operating pressure of 400 psi.

Is the ZW205 valve certified for potable water applications?

Yes, the ZW205 valve meets the requirements of NSF/ANSI/CAN 61 and is Lead Free, making it suitable for applications where weighted average lead content is a concern.

What is the standard pilot spring range for the ZW205?

The standard pilot spring range for the ZW205 valve is 50 to 200 psi, allowing for adjustable pressure control within this range.

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