Gate Valve

Watts gate valves are designed for full open/close operation through the vertical movement of the gate (disc), allowing straight-through flow with minimal pressure loss. The products offer high material durability, reliable sealing performance, and stable operation in water supply and fire protection systems. They are available in various configurations, including rising stem and non-rising stem designs, with metal wedge or EPDM-coated wedge options.

Introduction to Gate Valve

A gate valve is an industrial valve used to fully open or completely shut off flow in piping systems. Its distinctive design features a gate (disc) that moves vertically relative to the flow direction. When the gate is lifted, the fluid passes through freely; when lowered, the flow is completely blocked.

Gate valves are not intended for throttling. They perform best in fully open or fully closed positions. This design results in very low pressure loss, helping the system operate efficiently and maintain energy savings.

Among various brands on the market, Watts gate valves are considered a reliable choice due to their stable operation and long service life. The manufacturer focuses on precise engineering design, durable materials, and superior sealing performance, ensuring consistent efficiency even under high-pressure conditions or in large-diameter pipelines. This reliability positions Watts as a strong option in shut-off valve applications, especially for projects requiring high safety and performance standards.

Operating Principle of Gate Valve

A gate valve operates based on the linear (up-and-down) movement of the gate (disc). When the operator turns the handwheel or uses an actuator, the stem moves vertically, lifting or lowering the gate accordingly.

In the fully open position, the gate is completely lifted out of the flow path, creating a full-bore opening that allows fluid to pass through with minimal resistance. This helps reduce pressure drop and maintain stable flow within the system.

When the valve is closed, the gate moves downward and presses tightly against the valve seat, forming a secure shut-off point. This design enables high sealing performance, minimizes leakage, and ensures the safety of the entire pipeline system.

The full open/full close operating mechanism enhances durability and reduces wear during service. Depending on the design, gate valves are available in two main configurations:

• Rising Stem: The stem moves up and down along with the gate, allowing direct visual indication of the valve position.
• Non-Rising Stem: The stem does not change its external length during operation, making it suitable for installations with limited space.

Regardless of the configuration, gate valves are designed to operate best in fully open or fully closed positions and are not suitable for throttling. Operating the valve in a partially open position can cause flow turbulence, vibration, and accelerated wear of the gate, reducing the valve’s service life. Therefore, gate valves are typically used in applications requiring reliable shut-off, especially in large-diameter pipelines or high-pressure systems.

Watts Gate Valve Product Line

To meet the operational requirements of various piping systems, Watts offers a diverse range of gate valves with different materials, constructions, and connection standards. Below is an overview of key Watts gate valve models, helping customers easily select the most suitable product for their specific applications.

Series W-WB131

The W-WB131 is a bronze gate valve from Watts, designed for flow isolation in clean water systems and non-corrosive media. This model stands out for its compact size, ease of installation, and compatibility with various common thread standards. It is widely used in building water supply systems, water treatment, and residential–commercial applications thanks to its simple construction, stable durability, and reliable operation.

Below are the key technical specifications of this model:

• Valve size: DN15 – DN50
• Body material: Bronze C84400
• Nominal pressure: PN25
• Temperature range: -20°C to 120°C
• Connection standards: NPT (ASME B1.20.1), BSPT (BS 21), G thread (GB/T 7306.2)
• Working media: Water and non-corrosive liquids
• Certification: WRAS

Series E3243

The E3243 is a non-rising stem gate valve from Watts, featuring an epoxy-coated ductile iron body and an EPDM-coated wedge to ensure long-term sealing performance. It is designed for water supply, water treatment, and infrastructure applications where high mechanical strength, corrosion resistance, and reliable operation are required. The non-rising stem design saves installation space, while the standard flanged connection ensures compatibility with most existing piping systems and facilitates maintenance during operation.

Below are the key technical specifications of the valve:

• Valve size: DN50 – DN600
• Body material: Ductile iron GGG50
• Nominal pressure: PN16
• Temperature range: 0°C to 80°C
• Design standards: BS 5163, EN 1171, EN 1074-2
• Connection standard: EN 1092-2
• Working medium: Water
• Certification: WRAS 

Series 405-NRS-RW

The 405-NRS-RW is a non-rising stem gate valve with a resilient rubber wedge, designed to provide tight shut-off and stable operation under high differential pressure conditions. The valve is available with two connection types: flanged (DN50–DN300) and grooved (DN65–DN250), making it suitable for various piping systems. The body is fully epoxy-coated to enhance corrosion resistance and ensure durability in water environments. Operated by a handwheel, the valve performs best in fully open or fully closed positions and is commonly used in water supply, fire protection, and wastewater treatment systems.

Below are the key technical specifications of the 405-NRS-RW:

• Valve size: 
  • DN50 – DN300 (flanged) 
  • DN65 – DN250 (grooved)
• Body material: Cast iron A126 Class B or ductile iron A536 65-45-12
• Nominal pressure: 200 psi (≈ 14 bar) CWP
• Maximum temperature: 140°F (60°C)
• Connection standards:
  • ASME B16.1 Class 125 & AWWA Class D – Flanged end connection
  • AWWA C515 & C606 – Grooved end connection

Series W-Z41X-16Q

The W-Z41X-16Q is a rising stem gate valve from Watts, featuring an EPDM-coated wedge that provides stable sealing performance and reduces wear during operation. The rising stem design allows direct visual indication of the valve position, making it suitable for systems that require clear monitoring of open/close status. The valve body is made of epoxy-coated ductile iron, ensuring reliable performance in clean water, industrial water, and water treatment applications.

Below are the key technical specifications of the product:

• Valve size: DN50 – DN400
• Body material: Ductile iron coated with epoxy
• Connection: Flanged according to GB/T 17241.6
• Nominal pressure: PN16 / CL150
• Temperature range: 0°C to 80°C
• Working medium: Water
• Design standard: GB/T 12221-2005

Series R3001/R3001N

The R3001/R3001N is a brass non-rising stem gate valve, designed for clean water systems in residential and commercial applications. Its compact structure, stable operation, and good corrosion resistance make it suitable for pipelines with moderate pressure and high durability requirements. The valve features a brass disc, EPDM sealing, and a cast iron handwheel, ensuring reliable sealing performance throughout its service life. In addition to the BSPT threaded version, the R3001N model also supports NPT threads, providing compatibility with international piping systems.

Below are the key technical specifications of the R3001/R3001N series:

• Valve size: DN15 – DN50
• Body material: Brass
• Connection type: BSPT or NPT (R3001N model)
• Nominal pressure: PN16
• Temperature range: -20°C to 110°C
• Connection standards: BSPT to ISO 7-1, NPT to ASME B1.20.1
• Certification: ACS 

Series ZSZF4-Q-XXX-16

The ZSZF4-Q-XXX-16 is a non-rising stem gate valve designed for fire protection (firefighting) systems and water supply pipelines requiring high sealing performance. The valve features an epoxy-coated ductile iron QT450-10 body and an EPDM-coated wedge, ensuring stable operation and reduced wear during opening and closing under high pressure. The non-rising stem design saves installation space, making it suitable for underground systems or areas with height limitations. With a focus on durability and tight sealing, the ZSZF4-Q-XXX-16 is widely used in infrastructure projects, buildings, and fire protection systems.

Below are the key technical specifications of the ZSZF4-Q-XXX-16:

• Valve size: DN50 – DN250
• Body material: Ductile iron coated with epoxy QT450-10
• Nominal pressure: PN16
• Temperature range: 0°C to 80°C
• Connection standard: GB/T 17241.6
• Working medium: Water

Series ZSZF4-Q-XXX-16-M

The ZSZF4-Q-XXX-16-M is a rising stem gate valve designed for fire protection systems and water supply pipelines that require direct visual indication of the valve’s open/closed status. The valve body is made of epoxy-coated ductile iron QT450-10, combined with an EPDM-coated wedge, providing reliable sealing performance and enhanced wear resistance under high-pressure operating conditions. The rising stem design allows quick inspection of the valve position, making it suitable for continuously monitored systems.

Below are the key technical specifications of the ZSZF4-Q-XXX-16-M:

• Valve size: DN50 – DN250
• Body material: Ductile iron coated with epoxy QT450-10
• Nominal pressure: PN16
• Temperature range: 0°C to 80°C
• Connection standard: GB/T 17241.6-2008
• Working medium: Water

Series ZSXZF4-Q-XXX-16

The ZSXZF4-Q-XXX-16 series is a signal gate valve designed for fire protection systems, where monitoring the valve’s open/close status from a central control system is required. The valve features an epoxy-coated ductile iron body and an EPDM-coated wedge, ensuring stable sealing performance in fire water supply pipelines. During operation, the valve provides real-time signal feedback, supporting pressure monitoring and ensuring the system remains in a ready state. This valve is a suitable choice for projects requiring high safety standards, such as buildings, shopping centers, factories, and industrial fire protection systems. 

Below are the key technical specifications of the product:

• Valve size: DN50 – DN250
• Body material: Ductile iron coated with epoxy
• Nominal pressure: PN16
• Temperature range: 0°C to 80°C
• Connection standard: GB/T 17241.6-2008
• Protection grade: IP54
• Working medium: Water

Series W-Z15W-16P

The W-Z15W-16P is a non-rising stem gate valve made of CF8 stainless steel with a threaded connection, designed for systems requiring high durability and stable water quality, such as domestic water supply, residential buildings, commercial projects, and water treatment applications. With a fully stainless steel construction, the valve offers excellent corrosion resistance, stable operation, and is suitable for installation in confined spaces. The stainless steel disc and body ensure reliable sealing performance, while the handwheel operation is smooth and easy to maintain.

Below are the key technical specifications of the W-Z15W-16P:

• Valve size: DN15 – DN50
• Body material: Stainless steel CF8  
• Nominal pressure: PN16
• Temperature range: -29°C to 200°C
• Connection standard: GB/T 7307-2001
• Connection type: Threaded type
• Working medium: Water

Series W-Z41W-16P

The W-Z41W-16P is a CF8 stainless steel rising stem gate valve, designed to provide a clear visual indication of the open/closed status and meet stringent water quality requirements. Its full stainless steel construction offers excellent corrosion resistance, making it suitable for water supply systems, water treatment, buildings, factories, and applications requiring stable durability in humid or clean water environments. With a flanged connection (DN50 – DN300), the W-Z41W-16P is easy to install on large pipelines and ensures smooth operation through a robust rising stem mechanism.

Below are the key technical specifications of the W-Z41W-16P:

• Valve size: DN50 – DN300
• Body material: Stainless steel CF8
• Nominal pressure: PN16
• Temperature range: -29°C to 200°C
• Connection standard: JB/T 79.1-1994
• Working medium: Water

Series W-Z45W-16P

The W-Z45W-16P is a CF8 stainless steel non-rising stem gate valve, suitable for water supply, drainage systems, and technical projects requiring corrosion-resistant materials and stable operation. The non-rising stem design saves installation space, while the flanged connection ensures secure installation and reliable sealing on large pipelines. With good pressure resistance and high durability, the W-Z45W-16P is commonly selected for buildings, factories, domestic water supply systems, and infrastructure projects.

Below are the key technical specifications of the W-Z45W-16P:

• Valve size: DN50 – DN250
• Body material: Stainless steel CF8
• Nominal pressure: PN16
• Temperature range: -29°C to 200°C
• Connection standard: JB/T 79.1-1994
• Connection type: Flanged type
• Working medium: Water

Series B3001/B3001N

The B3001/B3001N series is a bronze non-rising stem gate valve, developed for shut-off applications in clean water and non-corrosive liquids compatible with the valve material. Thanks to its compact design, ease of operation, and stable durability, this valve is commonly used in building services, water treatment systems, and light industrial applications. The brass construction provides good corrosion resistance in water environments, ensuring reliable sealing and long service life. The B3001 model uses BSPT threads, while the B3001N version supports NPT threads for compatibility with different piping standards.

Below are the key technical specifications of the B3001/B3001N series:

• Valve size: DN15 – DN50
• Body material: Bronze CC491K
• Nominal pressure: PN20
• Temperature range: 0°C to 170°C
• Connection standards: BSPT thread (BS 21); NPT thread for B3001N model
• Test standard: BS 6755
• Working medium: Water, oil, steam
• Certification: WRAS 

Series W-WB132

The W-WB132 is a rising stem gate valve made of bronze C87800, designed for shut-off applications in water and non-corrosive liquids within small-diameter piping systems. The rising stem allows a clear visual indication of the valve position, while the bronze body, bonnet, and disc provide high durability and excellent corrosion resistance. This valve is commonly used in building services, water treatment systems, clean water supply, and light industrial applications, thanks to its robust construction, reliable sealing, and easy installation via standard threaded connections.

Below are the key technical specifications of the W-WB132:

• Valve size: DN15 – DN50
• Body material: Bronze C87800
• Nominal pressure: PN20
• Temperature range: -20°C to 120°C
• Connection type: NPT to ASME B1.20.1, BSPT to BS21
• Working medium: Water, non-corrosive liquids

Series W-Z45H-16Q

The W-Z45H-16Q is a non-rising stem gate valve with a metal-seated design, developed for shut-off applications in plumbing, HVAC, irrigation, commercial, and industrial systems. The valve body and bonnet are made of epoxy-coated ductile iron, enhancing corrosion resistance, while the metal disc provides high mechanical strength and stable operation across a wide temperature range from -10°C to 120°C. This valve is well-suited for systems requiring long-term durability, particularly in clean media and high-pressure conditions.

Below are the key technical specifications of the W-Z45H-16Q:

• Valve size: DN50 – DN400
• Body material: Ductile iron A536 65-45-12
• Nominal pressure: PN16
• Temperature range: -10°C to 120°C
• Connection standard: PN16 according to EN 1092-2
• Corrosion protection: Internally and externally liquid epoxy painted
• Working medium: Water, oil, gas
• Certification: WRAS 

Series W-Z45H-25Q

The W-Z45H-25Q is a non-rising stem gate valve with a metal-seated design, developed for plumbing, HVAC, irrigation, commercial, and industrial systems that require higher pressure ratings beyond PN16. The valve body and bonnet are made of epoxy-coated ductile iron, enhancing durability and corrosion resistance, while the metal wedge and seat ring ensure stable sealing performance and long service life under continuous operation. This valve is well-suited for pipelines requiring high mechanical strength, with pressure capability up to PN25 and reliable performance across a temperature range from –10°C to 120°C.

Below are the key technical specifications of the W-Z45H-25Q:

• Valve size: DN50 – DN300
• Body material: Ductile iron A536 65-45-12
• Nominal pressure: PN25
• Temperature range: -10°C to 120°C
• Connection standard: PN25 according to EN 1092-2
• Corrosion protection: Internally and externally liquid epoxy painted
• Working medium: Water, oil, gas  

Series W-Z45H-125Q

The W-Z45H-125Q is a non-rising stem gate valve with a metal-seated design, developed for industrial systems requiring very high pressure performance. With a pressure rating up to Class 125 (CL125), the valve is suitable for demanding operating conditions such as industrial HVAC, high-pressure systems, heavy commercial–industrial applications, and transmission pipelines requiring exceptional durability. The body and bonnet are made of epoxy-coated ductile iron for enhanced corrosion protection, while the metal wedge and bronze seat ring ensure reliable sealing performance even under high pressure.

Below are the key technical specifications of the W-Z45H-125Q:

• Valve size: DN50 – DN400
• Body material: Ductile iron A536 65-45-12
• Nominal pressure: Class 125 (CL125)
• Temperature range: -10°C to 120°C
• Connection standard: CL125 to ANSI B16.1
• Corrosion protection: Internally and externally liquid epoxy painted
• Working medium: Water, oil, gas
• Certification: WRAS

Series W-Z41H-16Q

The W-Z41H-16Q is a rising stem gate valve (OS&Y – Outside Stem & Yoke) with a metal-seated design, developed for plumbing, HVAC, irrigation, and industrial applications that require a clear visual indication of the valve’s open/closed status. The body and bonnet are made of epoxy-coated ductile iron to enhance corrosion resistance, while the metal wedge provides high mechanical strength and stable operation within a temperature range of –10°C to 120°C. The OS&Y design allows precise operational monitoring, making it suitable for systems that require frequent status inspection.

Below are the key technical specifications of the W-Z41H-16Q:

• Valve size: DN50 – DN400
• Body material: Ductile iron A536 65-45-12
• Nominal pressure: PN16
• Temperature range: -10°C to 120°C
• Connection standard: PN16 to EN 1092-2
• Corrosion protection: Internally and externally liquid epoxy painted
• Working medium: Water, oil, gas

Series W-Z41H-25Q

The W-Z41H-25Q is a rising stem gate valve (OS&Y) with a metal-seated design, developed for pipelines operating at pressures higher than the standard PN16. It is suitable for industrial systems, HVAC, irrigation, and technical applications requiring enhanced durability. The body and bonnet are made of epoxy-coated ductile iron for improved corrosion resistance, while the metal wedge, combined with a bronze seat ring, ensures stable operation even under high differential pressure during opening and closing. The OS&Y structure provides a clear visual indication of valve position, making it ideal for systems that require frequent operational monitoring.

Below are the key technical specifications of the W-Z41H-25Q:

• Valve size: DN50 – DN300
• Body material: Ductile iron A536 65-45-12
• Nominal pressure: PN25
• Temperature range: -10°C to 120°C
• Connection standard: PN25 to EN 1092-2
• Corrosion protection: Internally and externally liquid epoxy painted
• Working medium: Water, oil, gas

Series W-Z41H-125Q

The W-Z41H-125Q is a rising stem gate valve (OS&Y) with a metal-seated design, developed for heavy industrial systems and pipelines operating under very high pressure conditions. With a pressure rating of Class 125 (CL125), the valve is suitable for demanding environments requiring high mechanical strength, resistance to large differential pressure, and stable operation across a wide temperature range. The epoxy-coated ductile iron body enhances corrosion resistance, while the metal wedge with a bronze seat ring ensures tight and reliable sealing during operation. The rising stem design provides direct visual indication of valve position-an essential feature for systems requiring strict operational control.

Below are the key technical specifications of the W-Z41H-125Q:

• Valve size: DN50 – DN400
• Body material: Ductile iron A536 65-45-12
• Nominal pressure: Class 125 (CL125)
• Temperature range: -10°C to 120°C
• Connection standard: CL125 to ANSI B16.1
• Corrosion protection: Internally and externally liquid epoxy painted
• Working medium: Water, oil, gas
• Certification: WRAS

Toan Cau – Exclusive Distributor of Watts Gate Valves in Vietnam

In water supply, fire protection, and water treatment systems, selecting the right valve is only effective when working with a reliable supplier. With over 17 years of experience, Toan Cau has supplied building materials to numerous large-scale projects nationwide and understands the technical requirements of each application to provide appropriate solutions.

Toan Cau is currently the exclusive distributor of Watts gate valves in Vietnam, ensuring genuine products with full documentation and clearly specified technical data. For technical support in selecting the right model for your needs, customers can contact the hotline 0911 771 551.