All Products
Contact Person : Li
Phone Number : 18906241720

Non-Rising Stem Resilient Seated Gate Valve with Bidirectional Sealing for Water and Wastewater Systems

  • Non-Rising Stem Resilient Seated Gate Valve with Bidirectional Sealing for Water and Wastewater Systems
Place of Origin China
Brand Name YOUWEI

Contact me for free samples and coupons.

Whatsapp:0086 18588475571

Wechat: 0086 18588475571

Skype: sales10@aixton.com

If you have any concern, we provide 24-hour online help.

x
Product Details
Material Casting,Brass,Stainless Steel,Ductile Iron,GGG40 Port Size DN50-DN1200,Standard,2"-24",DN50-800,3/4"
Power Manual,Electrical Actuated,Hydraulic,Handwheel Operated,GO Pressure Medium Pressure,Low Pressure,PN10-16,PN1.0/PN1.6,250PSI
Temperature Of Media Medium Temperature,Normal Temperature,Low Temperature,-10~100℃ Media Water,Oil Etc.,Gas And So On
Application General,irrigation,water Distribution,Industry,Water System Structure Gate,Butterfly,Non-Rising Gate Valve
Standard Or Nonstandard Standard Product Name Gate Valve,Cast Iron Electric Gate Valve With Non-rising Stem DN40-DN600,DIN/BS Double Socket Type Resilient Seat Gate Valve,steel 2cr13 Stem Handwheel Api 6a Welhead Safety Gate Valve Stem Cap,3/4" Cast Iron Handle OEM 200 Wog Home Depot Brass Gate Valve
Standard DIN,BS,JIS,F5;AWWA C509/C515;ANSI,DIN3352 Size DN40-DN600,DN50 ~ DN 1000,2''-24'',DN15 To100
Connection Flange Ends,Double Flanged,BSP,Socket Ends,Female Thread Body Material Ductile Iron,DI/CI,DI,cast Iron,Brass
Color Blue,Customer's Request,Customer's Requirement,Yellow,GREY Medium Water,Water Oil Gas
Type Gate Valve,Normal Open,2-way,Non-Rising Stem/ NRS Valve Type Gate Valve
Seal Rubber Lined,Metal,PTFE
Highlight

Non-Rising Stem Gate Valve

,

Resilient Seated Gate Valve

,

Bidirectional Sealing Gate Valve
Leave a Message
Product Description
Non-rising Stem Resilient Seated Gate Valve
Product Overview
The Non-Rising Stem Resilient Seated Gate Valve is a shut-off valve specifically designed for pipeline systems handling water, wastewater, and other non-corrosive fluids. Its core features combine a non-rising stem design with elastic soft sealing, achieving exceptional performance in compact structure, reliable sealing, easy operation, and zero leakage. This valve is widely used in municipal water supply, building water supply and drainage, fire protection systems, irrigation, and industrial pipeline networks. It is particularly suitable for installation in confined spaces such as vertical shafts or underground pipelines.
Core Features and Advantages
  • Compact Structure, Space-Saving
    Non-Rising Stem Design: The stem nut is housed inside the valve body. During opening and closing, the stem only rotates without axial movement, resulting in no change in overall height. Compared to rising stem gate valves, this design significantly saves axial installation space.
  • Bidirectional Sealing, Zero Leakage
    Resilient Seat: The gate is fully encapsulated with high-quality rubber (e.g., EPDM, NBR) or features an embedded elastic seal ring. It utilizes line pressure to achieve self-sealing, providing bubble-tight sealing in both flow directions under low and high pressure, ensuring complete shut-off of media flow.
  • Low Operating Torque, Easy Operation
    As the stem does not move axially, only the friction in the threaded mechanism needs to be overcome. This results in low operating torque required for opening and closing, allowing for easy manual operation even in large-diameter applications.
  • Low Flow Resistance, High Flow Capacity
    When fully open, the valve provides a straight-through, smooth flow passage with a bore essentially equal to the pipeline internal diameter, minimizing pressure drop for the media.
  • Corrosion-Resistant, Durable, and Easy Maintenance
    Non-Corrosive Internal Design: The valve body interior and gate are typically coated with smooth, firmly bonded epoxy resin powder via electrostatic spray, effectively preventing corrosion and scaling, and ensuring clean water quality. Low-Maintenance Design: The main moving parts (stem, nut) are enclosed and protected within the valve body. Worn resilient sealing components can be replaced as a complete unit, ensuring low maintenance costs.
  • Monoblock Structure, High Strength
    The valve body is typically manufactured as a single, high-strength casting from materials like ductile iron (e.g., QT450-10), providing robust construction capable of withstanding high pipeline stresses.
Typical Construction
Body: Monoblock casting with a streamlined flow passage. Flanged ends conform to standards such as ISO, DIN, ANSI, GB, etc.
Bonnet: Bolted to the body, forming the pressure chamber.
Stem: Made of stainless steel (e.g., SS304, SS316) with a trapezoidal thread for transmission, offering wear and corrosion resistance.
Gate: Ductile iron shell fully encapsulated with high-performance rubber, or a combination of stainless steel skeleton and rubber seat.
Sealing System: The primary seal is achieved between the resilient gate face and the metal seat in the body (or an embedded seal ring). Stem sealing is provided by O-rings or a stuffing box to prevent external leakage.
Actuation Mechanism: Clockwise rotation of the handwheel closes the valve; counterclockwise opens it. Options include extension stems for underground operation, valve pit covers, or electric/pneumatic actuators for above-ground or remote operation.
Technical Parameters
Parameter Specification
Nominal Diameter DN50 ~ DN600 (2" ~ 24")
Nominal Pressure PN10/16, Class 125/150
Operating Temperature 0°C ~ +70°C (Depends on elastomer; EPDM suitable for water, up to 120°C max)
Applicable Media Water, wastewater, raw water, air, and other neutral fluids
Actuation Type Manual (handwheel), underground extension stem, electric, pneumatic
Body Material Ductile Iron, Cast Steel, Stainless Steel
Internal Coating Epoxy resin (compliant with potable water standards, e.g., NSF/ANSI 61)
External Coating Epoxy tar or heavy-duty corrosion-resistant coating meeting environmental requirements
Seal Material EPDM (water), NBR (oil, gas), NR (Natural Rubber), etc.
End Connection Flanged (RF), Grooved
Application Fields
  • Isolation in main and branch lines of municipal water supply and drainage networks
  • Water supply and fire protection pipeline systems in residential complexes, factories, and schools
  • Inlet and outlet pipelines for water treatment plants and pumping stations
  • Agricultural irrigation systems
  • Industrial water circulation systems
Selection Considerations
  1. Confirm media type, temperature, and pressure range to select appropriate body materials and seal materials
  2. Based on pipeline installation space, decide between non-rising stem or rising stem construction
  3. Verify that pipeline connection standards (e.g., flange bore, pressure class) match the valve specifications
  4. For underground installation, specify the type and length of the extension stem and provide a matching valve pit
Tags:

non rising gate valve

gate valve cast iron

elastic seat gate valve