ANSI Class 150 Manual Stainless Steel Gate Valve Cast Steel Rising Stem Flange Gate Valve Resilient Seat Gate Valve

Specification

ANSI Class 150 Manual Stainless Steel Flanged Gate Valve: A Universal Solution for Industrial Fluid Control

I. Product Overview

As a critical shut-off device in industrial pipeline systems, the TIANYU ANSI Class 150 manual stainless steel flanged gate valve is constructed from 304/316 stainless steel or WCB cast steel. Featuring a rising stem structure, the valve enables precise on-off control for pipelines. With a diameter range of 1/2″ to 12″ (DN15-DN300) and ANSI Class 150 pressure rating (up to 1.6MPa), it stably manages the flow of water, gases, and oil products within -20°C to 180°C. The flanged connection complies with ASME B16.5, while the design adheres to API 600 and ASME B16.34, making it ideal for petrochemical, water supply, and HVAC applications.

II. Core Features: Technical Optimization of Material and Structure

Performance Advantages of Stainless Steel and Cast Steel
- 304/316 Stainless Steel: The 18% chromium and 8% nickel alloy in 304 offers excellent corrosion resistance in humid environments and weak acid-base media. 316 stainless steel, with added molybdenum, withstands seawater and chemical media with chloride content ≤200ppm.
- WCB Cast Steel: Complying with ASTM A216, WCB steel (normalized and tempered) achieves tensile strength ≥485MPa, suitable for high-temperature steam and hot oil systems (up to 425°C).
Rising Stem and Elastic Seal Design
- Visual Operation via Rising Stem: The stem moves vertically with opening/closing, linearly corresponding to handwheel rotations to prevent misoperation. Paired with a copper alloy stem nut (QT400) and graphite packing, it reduces operating torque by 30%, with force ≤150N·m (DN100).
- Elastic Seat Sealing: The valve seat uses EPDM/NBR rubber or PTFE, forming a “soft seal + hard seal” dual structure with the metal gate, meeting API 598 bubble-tight standards (leakage ≤0.01×DN mm³/s).
Full Operational Condition Adaptability
- Temperature Resistance: Stainless steel maintains yield strength ≥150MPa at -10°C and ensures thermal deformation ≤0.1mm/100mm at 180°C.
- Medium Compatibility: Besides water and air, it tolerates light oils and neutral salt solutions, with optional food-grade seals (FDA-certified) for drinking water applications.

III. Key Attributes: Technical Parameters and Standard Compliance

Attribute Category	Specific Parameters
Diameter Range	1/2″~12″ (DN15~DN300), supporting non-standard customization (min DN10, max DN400)
Pressure Rating	ANSI Class 150 (PN16, 1.6MPa), optional Class 300 (PN40, 4.0MPa)
Body Material	304 SS (CF8), 316 SS (CF8M), WCB cast steel, upgradable to duplex stainless steel (2205)
Sealing System	Seat: EPDM/NBR/PTFE; Packing: flexible graphite + PTFE, compliant with ISO 15848-1 low-leakage standards
Actuation	Manual (handwheel-driven), reserved for electric/pneumatic actuators (ISO 5211 platform)
Connection Type	Flanged (RF face), bolt spacing per ASME B16.5, face-to-face dimensions per ASME B16.10
Standards	Design: API 600, ASME B16.34; Testing: API 598, ISO 5208; Surface treatment: ISO 12944-C3
Suitable Media	Water, steam, air, light oils, neutral salt solutions; H₂S-resistant materials (NACE MR0175 certified) optional

Product Overview

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

Material Forming and Heat Treatment
- Stainless Steel Casting: Vacuum induction melting controls sulfur ≤0.03%, with casting temperatures at 1550°C-1600°C. Resin sand molding eliminates shrinkage and inclusions, followed by 1050°C solution treatment for grain size ≥Grade 5.
- Cast Steel Heat Treatment: WCB bodies undergo 900°C normalizing + 650°C tempering, hardness HB170-220, to eliminate internal stress.
Precision Machining and Surface Treatment
- Seal Surface Grinding: CNC grinding achieves surface roughness Ra≤0.8μm, with matching error ≤0.01mm for mirror-level fitting.
- Stem Processing: 20Cr13 stems (quenched and tempered to HRC28-32) are chrome-plated (0.02-0.05mm) for 4x wear resistance, ensuring 100,000 cycles without jamming.
- Anti-Corrosion Coating: Shot-blasted to Sa2.5, the body is sprayed with epoxy powder (≥150μm), passing 500+ hours of salt spray testing.
Quality Inspection System
- Material Certification: Each batch provides spectral analysis (e.g., 304: C≤0.08%, Ni≥8%) and mechanical property reports.
- Pressure Testing: Shell test at 1.5x nominal pressure (2.4MPa) for 15 min; seal test at 1.1x nominal pressure (1.76MPa) for 5 min, with no visible leakage.
- NDT: 100% magnetic particle inspection (MT) for key welds to ensure defect-free surfaces.

Valve Details

V. Product Advantages: Practical Value in Industrial Scenarios

Longevity and Low Maintenance
Stainless steel bodies offer 5x better corrosion resistance than cast iron, with a 10+ year service life in coastal areas. The rising stem design reduces maintenance time by 60%, with one sewage plant reporting 40% lower annual costs.
Flexible Customization and Fast Delivery
Supports customization for flange standards (ANSI/JIS/DIN/GB), seal materials, and connections (welded/threaded), with MOQ=1. Regular orders ship in 7 days; batches over 300 units can be expedited to 15 days.
Cost-Performance Balance
304 stainless steel reduces costs by 25% compared to 316, maintaining 80% corrosion resistance for non-aggressive media. Forging reduces weight by 15%, lowering transportation and installation costs.
Global Service Support
CE/SGS-certified products comply with North American, European, and Southeast Asian standards. 24-hour technical response, on-site installation guidance, and 48-hour emergency parts delivery from major port cities.

Application

VI. Application Fields: Multi-Industry Fluid Control Coverage

Petrochemical Industry
- Shut-off for chemical storage tanks, resistant to methanol and ethanol;
- Circulating water systems in refineries, controlling cooling media flow.
Water Supply and Municipal Engineering
- Sectional valves for urban water mains, with DN100 suitable for trunk-branch connections;
- Aeration systems in wastewater plants, PTFE seals preventing ozone corrosion.
Energy and HVAC
- Condensate pipelines in thermal power plants, stable operation at 180°C;
- HVAC water systems in commercial buildings, rising stems facilitating property inspections.
Food and Pharmaceutical Sectors
- Pure water pipelines in beverage production, 304 SS meeting food-grade standards;
- Steam sterilization equipment in pharmaceutical workshops, ensuring leak-free high-temperature operation.