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

Specification

TIANYU 304 Stainless Steel Rising Stem Flanged Gate Valve: Universal Solution for Industrial Fluid Control

I. Product Overview

As a widely applied shut-off device in industrial pipeline systems, the TIANYU 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

Attribute Category	Specific Parameters
Nominal Diameter Range	DN50~DN400 (2″~16″), supporting customized production for DN100
Pressure Class	ANSI 150LB (PN16), 300LB (PN40), complying with ASME B16.34 pressure-temperature ratings
Body Material	AISI 304 stainless steel (CF8), upgradable to 316 stainless steel (CF8M) for strong corrosion resistance in seawater, etc.
Sealing System	Valve seat: Stellite alloy overlay welding; Packing: PTFE + flexible graphite, compliant with FDA food contact material certification (optional)
Actuation Method	Manual (handwheel-driven), with reserved interfaces for electric/pneumatic actuators (ISO 5211 platform)
Connection Type	Flanged connection (RF raised face), bolt hole spacing compliant with ASME B16.5, face-to-face dimensions following ASME B16.10
Manufacturing Standards	Design: API 600; Testing: API 598; Surface treatment: ISO 12944-C3 anti-corrosion grade
Warranty Period	1 year (warranty for material and process defects under normal conditions)

Product Overview

IV. Manufacturing Processes: Precision Control from Material to Finished Product

Stainless Steel Forging and Heat Treatment

Melting and Casting: 304 stainless steel is melted in a vacuum induction furnace with sulfur content controlled ≤0.03%, cast at 1550°C~1600°C, and resin sand molding ensures no shrinkage or slag inclusions in the valve body.
Solution Treatment: Castings undergo 1050°C high-temperature quenching with rapid water cooling to refine grains, achieving grain size ≥Grade 5 and tensile strength ≥520MPa.
Stress Relief: The bonnet and body are annealed at 650°C to eliminate machining stress, preventing deformation and cracking during use.

Precision Machining and Surface Treatment

Seal Surface Grinding: Valve seat and gate seal surfaces are machined by CNC grinders to surface roughness Ra≤0.8μm, with matching grinding error ≤0.01mm for mirror-level fitting.
Stem Treatment: 20Cr13 stainless steel stems are quenched and tempered (hardness HRC28~32) with 0.02~0.05mm chrome plating, enhancing wear resistance by 4 times.
Anti-Corrosion Coating: The body surface is shot-blasted to Sa2.5 grade and sprayed with epoxy resin powder (thickness ≥150μm), passing salt spray tests ≥500 hours without rust.

Full-process Quality Inspection

Material Certification: Each batch of stainless steel provides spectral analysis reports (C≤0.08%, Ni≥8%) and mechanical property test data.
Pressure Testing:
- Shell strength: 1.5x nominal pressure (e.g., 2.4MPa for PN16 valves), holding pressure for 15 minutes.
- Seal performance: 1.1x nominal pressure, holding for 5 minutes with no visible leakage at the outlet.
Nondestructive Testing: Critical welds undergo 100% magnetic particle inspection (MT) to ensure no surface defects like cracks.

Valve Details

V. Product Advantages: Practical Value in Industrial Scenarios

Long Life and Low Maintenance Costs
The 304 stainless steel body resists corrosion 5 times better than cast iron valves, with a service life of over 10 years in coastal humid environments. The rising stem design allows packing replacement without pipeline disassembly, reducing maintenance time by 60%. Data from a sewage treatment plant shows the valve reduces annual maintenance costs by 40% compared to similar products.
Flexible Customization and Rapid Delivery
Supports customized requirements for flange standards (ANSI/DN/JIS), seal materials (EPDM/NBR), and connection types (welding/threaded), with a minimum order quantity of 1 piece. Regular orders are delivered within 7 days, and batches over 300 pieces can be shortened to 15 days through negotiation, meeting urgent project needs.
Balance of Cost and Performance
Compared to 316 stainless steel valves, 304 material reduces costs by 25% while maintaining 80% corrosion resistance, suitable for non-strong corrosive conditions. Forging processes improve material density, reducing weight by 15% compared to cast steel valves, with synchronous decreases in transportation and installation costs.
Global Service Support
Products are CE- and SGS-certified, compatible with standards in North America, Europe, Southeast Asia, etc. Providing 24-hour technical response, overseas projects can arrange on-site installation guidance by engineers. Spare parts are inventoried in major port cities, with urgent parts delivered within 48 hours.

Application

VI. Application Fields: Multi-industry Fluid Control Coverage

Petrochemical Industry

Inlet/outlet shut-off for chemical raw material storage tanks, resistant to organic solvents like methanol and ethanol.
Circulating water systems in refineries, controlling cooling medium flow and resisting scale deposition.

Water Supply/Drainage and Municipal Engineering

Sectional valves for urban water supply networks, with DN100 specification suitable for main and branch pipe connections.
Aeration systems in sewage treatment plants, regulating air flow, with PTFE seals preventing ozone corrosion.

Energy and HVAC

Condensate pipelines in thermal power plants, stable opening/closing under 150°C high-temperature conditions.
Central air conditioning water systems in commercial buildings, cooperating with balance valves for flow regulation, with rising stems facilitating property inspections.

Food and Pharmaceutical Industries

Pure water pipelines in beverage production lines, with 304 stainless steel meeting food-grade hygiene requirements.
Steam sterilization equipment in pharmaceutical workshops, with metal seals ensuring no leakage during high-temperature sterilization.