4 ZW205 RELIEF/SUSTA FIRE VLV ANG BODY ANSI 300 FLG SS SEAT CPR TUBNG BRZ FTNGS

Item Number: 4-ZW205FPAY
1 1
$11,772.99
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When Will it Ship: Contact for Lead Time
Estimated transit time: 2 to 5 Business Days

Brand - Wilkins
  • Pilot Operated Pressure Relief / Pressure Sustaining Valve
  • Maintains pre-determined upstream pressure
  • 4 inch nominal pipe size
  • Angle style body
  • ANSI Class 300 Flanged end connections
  • Ductile Iron body and bonnet
  • Stainless Steel seat and stem
  • Blue Epoxy Coated, FDA Approved

Description

The Zurn Wilkins Model ZW205 is a 4-inch pilot-operated pressure relief and pressure sustaining valve with an angle style body and ANSI Class 300 flanged connections. It is designed to maintain a predetermined upstream pressure in critical applications, functioning as both a relief valve for excess pressure and a sustaining valve for consistent flow. Key features include a durable ductile iron body, stainless steel seat and stem, blue epoxy coating, and a standard pilot spring range of 50-200 psi. The valve is certified to ANSI/AWWA C530 and NSF/ANSI/CAN 61 standards, ensuring reliable performance and lead-free compliance. Item number 4-ZW205FPAY.

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Connection Type

  • This valve features ANSI Class 300 Flanged end connections, designed for direct bolting to corresponding 4-inch ANSI Class 300 flanges in your piping system.

Installation Orientation

The recommended installation orientation for ACVs is horizontal, with the valve cover up. 6" and larger valves should only be installed horizontally, with the valve cover up, due to the difficulty of properly bleeding air out of the cover and performing maintenance on valves installed in the vertical orientation.
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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 4 inch valve can function as both a pressure relief valve and a pressure sustaining valve, utilizing a pilot assembly to modulate flow and maintain desired upstream pressure.

Application & Function

  • The valve maintains desired upstream set pressure by modulating between closed (sustaining) and open (relief) positions.
  • It opens to relieve excess pressure when upstream pressure exceeds the set point and stays closed when it's below, thus sustaining pressure.

Standard Features

  • Blue epoxy coated, FDA Approved finish.
  • Includes a pilot assembly with a "Wye" Type Strainer, Closing Speed Control (for sizes 1 1/4" - 4"), and Isolation Valves.
  • Features an Inlet Pressure Gauge, Copper Tubing, and Brass Fittings.

Body & Connections

  • Features an angle style body for installation versatility.
  • Equipped with ANSI Class 300 Flanged end connections.

Specifications

  • Valve Type: Pilot Operated Pressure Relief / Pressure Sustaining Valve
  • Nominal Pipe Size: 4 inch
  • Body Style: Angle
  • End Connection: ANSI Class 300 Flanged

Materials

  • 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
  • Coatings: Blue Epoxy Coated, FDA Approved
  • Tubing & Fittings: Copper Tubing and Brass Fittings

Performance

  • Temperature Rating: Water 33°F to 140°F
  • Pilot Spring Range: 50-200 psi (standard)
  • Minimum Inlet Pressure: 10 PSI

Certificates & Approvals

  • Standards Compliance: ANSI/AWWA C530
  • Lead Content: Meets NSF/ANSI/CAN 61* (*0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT)

FAQs

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

The Zurn Wilkins ZW205 valve is designed to serve as both a pressure relief valve and a pressure sustaining valve. Its primary function is to maintain a pre-determined upstream pressure by either relieving excess pressure or sustaining it when the upstream pressure is below the set point.

What size and connection type is this specific ZW205 model?

This specific ZW205 model is a 4-inch valve with an angle style body and ANSI Class 300 Flanged end connections.

What materials are used for the main components of the valve?

The main valve body and bonnet are made from Ductile Iron ASTM A536. The disc guide, seat, and stem are Stainless Steel, while the disc is Buna-N Rubber and the diaphragm is Nylon Reinforced Buna-N.

Does this valve include a pilot system and other standard features?

Yes, this ZW205 model comes with a comprehensive pilot system, including a "Wye" Type Strainer, Closing Speed Control, and Isolation Valves. It also includes an Inlet Pressure Gauge, Copper Tubing, and Brass Fittings as standard features.

What are the certification and lead-free compliance details for the ZW205?

The ZW205 valve complies with ANSI/AWWA C530 standards and meets the requirements of NSF/ANSI/CAN 61, indicating its suitability for potable water applications and lead-free status (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT).

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