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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
Lugar de origem China
Marca YOUWEI

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Detalhes do produto
Material Fundição, latão, aço inoxidável, ferro dúctil, GGG40 Tamanho da porta DN50-DN1200,Padrão,2"-24",DN50-800,3/4"
Poder Manual, Acionado Elétrico, Hidráulico, Operado por Volante, GO Pressão Pressão Média, Baixa Pressão, PN10-16, PN1.0/PN1.6, 250 PSI
temperatura do meio Temperatura média, temperatura normal, baixa temperatura, -10 ~ 100 ℃ Mídia Água, óleo etc., gás e assim por diante
Aplicativo Geral, irrigação, distribuição de água, indústria, sistema de água Estrutura Válvula de gaveta, borboleta e não ascendente
Padrão ou não padrão Padrão Nome do produto válvula de gaveta, válvula de gaveta elétrica de ferro fundido com haste não ascendente DN40-DN600,
Padrão DIN,BS,JIS,F5;AWWA C509/C515;ANSI,DIN3352 Tamanho DN40-DN600,DN50 ~ DN 1000,2''-24'',DN15 To100
Conexão Extremidades de flange, flange duplo, BSP, extremidades de soquete, rosca fêmea Material do corpo Ferro dúctil, DI/CI, DI, ferro fundido, latão
cor Azul, solicitação do cliente, exigência do cliente, amarelo, cinza Médio Água, Água Óleo Gás
Tipo Válvula gaveta, normalmente aberta, 2 vias, haste não ascendente/ NRS Tipo de válvula válvula de porta
Selo revestido de borracha, metal, PTFE
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Non-Rising Stem Gate Valve

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Resilient Seated Gate Valve

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Bidirectional Sealing Gate Valve
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Descrição de produto
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
Etiquetas:

válvula de porta não ascendente

válvula de porta de ferro fundido

Válvula de porta elástica do banco