Specification

DN50-DN1200 PN16 Stainless Steel Gun Metal Rising Stem Soft Seal Gate Valve

I. Product Overview

NEWWAY stainless steel gun metal rising stem gate valve is a high-performance flow control component engineered for industrial pipeline systems, combining the corrosion resistance of stainless steel with the reliable sealing of soft seal technology. Designed as a full-bore isolation valve, it features a rising stem structure—where the stem moves upward as the valve opens, providing clear visual indication of valve position. This valve is tailored to regulate, intercept, and isolate media such as water, steam, gas, and oil, with a size range of DN50 to DN1200 and pressure ratings from 1.0MPa to 2.5MPa, making it suitable for municipal engineering, petroleum, chemical, food, medicine, and energy sectors.

Crafted from premium materials (304/316 stainless steel, gun metal) and equipped with elastic soft seals, the valve delivers zero leakage, corrosion resistance, and long service life, ensuring stable operation in both routine and harsh industrial environments.

II. Key Attribute Specifications

A. Dimensional and Pressure Parameters

Nominal Diameter: Available in DN50 to DN1200, covering small to large-diameter pipeline systems. DN50-DN300 is commonly used in municipal water supply and industrial process lines, while DN400-DN1200 caters to large-scale infrastructure such as water treatment plants and power plant cooling systems.

Pressure Rating: 1.0MPa (PN10) to 2.5MPa (PN25), compatible with low-pressure municipal pipelines (e.g., tap water networks) and medium-pressure industrial systems (e.g., chemical process lines, steam auxiliary pipelines).

Temperature Range: 0℃ to 80℃, suitable for ambient and moderately heated media. For high-temperature applications (up to 120℃), optional high-temperature soft seals (e.g., EPDM with heat-resistant additives) are available.

B. Material Composition

Valve Body & Bonnet:

304 Stainless Steel (CF8): Contains 18-20% chromium and 8-10.5% nickel, offering excellent corrosion resistance to water, mild acids, and atmospheric conditions. Ideal for potable water, food processing, and coastal applications.

316 Stainless Steel (CF8M): Adds 2-3% molybdenum to 304, enhancing resistance to chlorides, sulfides, and aggressive chemicals (e.g., seawater, industrial wastewater with chlorine).

Gun Metal (Bronze): A copper-tin alloy with good corrosion resistance in water and steam, often used for valve internals (e.g., stem bushings) to reduce friction and enhance wear resistance.

QT450 Ductile Iron: Optional for large-diameter valve bodies (DN600+), balancing strength and cost-effectiveness for non-corrosive media.

Gate & Stem:

Gate: 304/316 stainless steel, precision-machined with a full-bore design to minimize pressure drop. The gate is wrapped in elastic soft seal material (EPDM/NBR) for tight sealing.

Stem: 304/316 stainless steel, rising stem structure with precision threading (trapezoidal thread) for smooth operation. Surface treatment (electropolishing) reduces friction and corrosion.

Sealing Material:

EPDM (Ethylene Propylene Diene Monomer): Standard soft seal material, resistant to water, steam, and mild chemicals, with good elasticity to compensate for pipeline deformation.

NBR (Nitrile Butadiene Rubber): Optional for oil and fuel applications, offering excellent resistance to hydrocarbons.

PTFE (Polytetrafluoroethylene): For corrosive media (e.g., weak acids), providing chemical inertness and high-temperature tolerance up to 120℃.

C. Structural and Operational Parameters

Connection Type: Flanged, conforming to standards such as GB/T 17241.6 (China), JB/T 79 (China), and EN 1092-1 (Europe). Flange faces are raised face (RF) for secure gasket sealing, ensuring leak-tight assembly with pipeline flanges.

Stem Type: Rising stem, where the stem extends outward as the valve opens—providing visual confirmation of valve position (open/closed) and simplifying maintenance.

Transmission Modes:

Manual: Handwheel operation (for DN50-DN300), with a rotating handwheel driving the stem via a nut, enabling precise opening/closing.

Bevel Gear: For large diameters (DN300+), reducing operating torque via gear reduction, suitable for manual operation in tight spaces.

Electric: Equipped with electric actuators (AC220V/DC24V) for remote control, supporting on-off and modulating control via 4-20mA signals.

Pneumatic: Pneumatic actuators (double-acting/spring-return) for fast response, ideal for automated industrial systems requiring quick isolation.

Design Standards: Complies with GB/T 32290, GB/T 12232, and CJ/T 216, ensuring compatibility with domestic and international pipeline systems.