Product Description

HIGH-TEMPERATURE VALVES

PRODUCT OVERVIEW

Common Temperature Classifications:

• Medium-high temperature: 200 ~ 450
• High temperature: 450 ~ 600
• Ultra-high temperature: Above 600

TECHNICAL SPECIFICATIONS

• Nominal Diameter (DN): DN10 ~ DN2000
• Nominal Pressure (PN): PN1.6 ~ PN42.0MPa, Class150 ~ Class2500
• Working Temperature: -20 ~ 1200 (conventional 650; special ceramic/alloy materials can achieve higher temperatures)
• Connection Types: Flange, Butt Weld, Socket Weld, Wafer
• Actuation Methods: Manual, Gear Operated, Electric, Pneumatic, Hydraulic
• Leakage Class: Class IV, Class V, Class VI (metal hard-seated valves are mostly Class IV/V)
• Applicable Media: High-temperature steam, high-temperature water, heat transfer oil, flue gas, hot air, high-temperature gas, corrosive high-temperature media

MAIN COMPONENT MATERIALS

1. Body / Bonnet

• Carbon Steel: WCB, WCC (450)
• Chrome-Molybdenum Heat-Resistant Steel: WC6, WC9, C12A, F11, F22, F91 (450~650)
• Stainless Steel: 304, 316, 321, 310S, 309S (heat and corrosion resistant)
• High-Temperature Alloys: Inconel, Monel, Hastelloy (for ultra-high temperature / strong corrosion)
• Special Materials: Heat-resistant cast iron, cast steel, ceramic materials (for ultra-high temperature flue gas)

2. Internal Parts (Disc / Seat / Stem)

• Stem: 2Cr13, 304, 316, F6a, Chrome-Molybdenum Steel, Nickel-Based Alloys
• Sealing Surface: Stellite alloy overlay, hard alloy, nitriding treatment, tungsten carbide
• Gasket / Packing: Flexible graphite, metal wound gasket, serrated gasket, carbon fiber packing, flexible graphite braided packing

PRODUCT FEATURES

• Heat and Creep Resistant: Made of heat-resistant alloy steel, ensuring no deformation or failure under long-term high-temperature conditions.
• Thermal Expansion Compensation Design: Prevents jamming and leakage caused by high-temperature thermal expansion.
• Reliable Sealing: Primarily metal hard-seated, resistant to high temperatures and erosion.
• Heat Dissipation / Insulation Structure: Some models are equipped with heat sinks to protect packing and actuators.
• Oxidation and Erosion Resistant: Hardened sealing surface treatment extends service life.
• High Strength and Rigidity: Reasonable valve body wall thickness design withstands high-temperature and high-pressure shocks.
• Long Service Life: Anti-fatigue, anti-seize, and anti-stem blowout structures ensure durability.