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

Item Number: 6-ZW205FPG
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$15,277.27
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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
  • Body Type: Globe Style
  • Connection: 6 inch ANSI 150 Flanged
  • Main Valve Body Material: Ductile Iron ASTM A536
  • Seat Material: Stainless Steel
  • Disc Material: Buna-N Rubber
  • Pilot Spring Range: 50-200 psi
  • Certifications: ANSI/AWWA C530, NSF/ANSI/CAN 61, Lead Free

Description

The Zurn Wilkins Model ZW205 is a 6 inch pilot-operated pressure relief and pressure sustaining valve designed to maintain a predetermined upstream pressure. It automatically modulates to relieve excess pressure when upstream pressure exceeds the set point and sustains pressure when below it. This globe body valve features durable Ductile Iron construction, a stainless steel seat, and Buna-N rubber disc for reliable performance. It includes a pilot assembly with a "Wye" type strainer, isolation valves, inlet pressure gauge, and standard copper tubing with brass fittings. Certified Lead Free to NSF/ANSI/CAN 61 and ANSI/AWWA C530, it ensures safe and compliant operation for critical water control applications. Item number 6-ZW205FPG.

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Connection Type

This Zurn ZW205 valve, SKU 6-ZW205FPG, features a 6 inch ANSI Class 150 flanged connection. This connection type is designed for secure, bolt-on installation into existing flanged piping systems.

General Connection Options for ZW205 Series

  • Flanged: Available in ANSI Class 150 (as in this product) or ANSI Class 300 for higher pressure applications.
  • Threaded: NPT (National Pipe Taper) threaded connections are available for smaller sizes.
  • Grooved: IPS Grooved connections are also available, offering another versatile installation option.

The valve's globe body configuration is suitable for a wide range of flow control applications, ensuring stable operation. For 6 inch and larger valves, recommended installation is horizontal with the valve cover up for proper air bleeding and maintenance.

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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 6 inch globe body valve modulates to relieve excess pressure or sustain upstream pressure at a desired set point.

Application

  • The valve is engineered to automatically open and relieve excess pressure when upstream pressure exceeds a set point.
  • The main valve remains closed to sustain pressure when upstream pressure is below the set point.

Standard Features

  • Blue Epoxy Coated, FDA Approved
  • Pilot Assembly includes a "Wye" Type Strainer, Closing Speed Control (for sizes 1 1/4" - 4"), and Isolation Valves
  • Includes Inlet Pressure Gauge
  • Includes ANSI Class 150 Flanges (as part of standard features, not the connection type of this specific valve, which is 150 Flanged)
  • Features Copper Tubing and Brass Fittings for pilotry

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

Specifications

  • Valve Type: Pilot Operated Pressure Relief / Pressure Sustaining
  • Body Configuration: Globe Style
  • Nominal Size: 6 inch
  • Connection Type: ANSI Class 150 Flanged
  • 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

Pilot System Details

  • Pilot System Components: "Wye" Type Strainer, Closing Speed Control, Isolation Valves, Inlet Pressure Gauge, Copper Tubing, Brass Fittings
  • Temperature Rating (Water): 33°F to 140°F
  • Pilot Spring Range: 50-200 psi
  • Minimum Inlet Pressure: 10 psi

Certificates & Approvals

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

FAQs

What is the primary function of the Zurn ZW205 valve?

The Zurn ZW205 functions as a pilot-operated pressure relief and pressure sustaining valve. It is designed to maintain a pre-determined upstream pressure by relieving excess pressure or sustaining it at a set point.

What are the main materials used in the construction of this valve?

The main valve body and bonnet are constructed from Ductile Iron ASTM A536. Key internal components include a Stainless Steel disc guide, stem, and seat, along with a Buna-N Rubber disc and Nylon Reinforced Buna-N diaphragm.

What certifications does the Zurn ZW205 valve hold?

This valve is certified to ANSI/AWWA C530 and meets the requirements of NSF/ANSI/CAN 61 for lead content (0.25% MAX. WEIGHTED AVERAGE LEAD CONTENT), ensuring it is Lead Free.

How does the 6-ZW205FPG connect to a piping system?

The 6-ZW205FPG model features a 6 inch ANSI Class 150 flanged connection, designed for secure bolt-on installation into compatible flanged piping systems.

What is the standard pilot spring range for this valve?

The standard pilot spring range for the Zurn ZW205 valve is 50 to 200 psi, allowing for adjustment to meet specific system pressure requirements.

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