Specification

Newway DN100 4 Inch ANSI 150LB Rising Stem Stainless Steel 304 Handwheel Flange Gate Valve Metal Seated Gate Valve

I. Product Overview

As a widely applied shut-off device in industrial pipeline systems, the Newway 304 stainless steel rising stem flanged gate valve is forged from AISI 304 stainless steel (0Cr18Ni9), with standard configurations of ANSI 150LB pressure class and DN100 nominal diameter. It enables precise on-off control for various media such as water, gases, and oil products. Featuring a rising stem structure and operated via a handwheel, the valve suits temperature ranges from -20°C to 150°C and working pressures from 1.6MPa (PN16) to 4.0MPa (PN40), complying with ASME B16.5 flange standards and API 600 design specifications. It serves as an ideal choice for petrochemical, water supply/drainage, HVAC, and other fields.

II. Core Features: Dual Optimization of Material and Structure

Corrosion Resistance Advantage of 304 Stainless Steel
The valve body uses ASTM A351 CF8-grade 304 stainless steel, with an alloy composition of 18% chromium and 8% nickel, endowing excellent anti-corrosion capabilities in humid air, condensed water, and weak acid-base environments. After solution treatment, intergranular corrosion tendency is reduced, making it suitable for sanitary-demanding scenarios like food processing and pharmaceuticals.

Visual Operation of Rising Stem Structure
The rising stem design (OS&Y) visually indicates the valve’s opening/closing status through vertical stem movement. The number of handwheel rotations linearly corresponds to the stem extension, preventing misoperation. Combined with a copper alloy stem nut (QT400 material) and graphite packing, it reduces opening/closing torque by 30%, with operating force ≤150N·m (DN100 specification), ensuring smooth operation even after long-term inactivity.

Combination of Metal Hard Seal and PTFE Soft Seal
The valve seat is hardened with 2Cr13 stainless steel and overlay welded with Stellite alloy to form a metal hard seal pair, supplemented by PTFE packing for a “dual-insurance” sealing effect: Metal seals suit high-temperature conditions (up to 150°C), while PTFE ensures bubble-tight sealing at room temperature (API 598 testing leakage ≤0.01×DN mm³/s).

Full Working Condition Adaptability Design

Temperature Resistance: At -20°C, 304 stainless steel maintains yield strength ≥150MPa; in 150°C high-temperature steam systems, body thermal deformation ≤0.1mm/100mm.

Pressure Stability: The PN16 version passes a 2.4MPa hydrostatic strength test (1.5x nominal pressure) with no leakage after 15 minutes of pressure holding.

Medium Compatibility: Besides water and air, it shows good tolerance to light oil products like diesel and kerosene, as well as neutral salt solutions.

III. Key Attributes: Technical Parameters and Standard Compliance