High Pressure Ball Valve / Trunnion Mounted Ball Valve, Forged Steel, Flanged, Gear Operated, Two-Piece Body, Oil/Gas, API 6D Standard

Product Description

High Pressure Valve Product Introduction

PRODUCT INTRODUCTION

TECHNICAL SPECIFICATIONS

1. Pressure Parameters
   • Nominal Pressure (PN): National standard: PN10, 16, 25, 40, 64, 100, 160, 250, 320, 420, etc.; American standard: Class 600, 900, 1500, 2500, 4500, etc.
   • Working Pressure: Generally corresponds to the nominal pressure. For some working conditions, pressure rating conversion is required based on temperature.
   • Test Pressure: The shell test is conducted at 1.5 times the nominal pressure, and the seal test at 1.1 times the nominal pressure, with longer pressure holding times and stricter testing standards.
2. Nominal Diameter Parameters
   • Nominal Diameter (DN): Conventional DN3~350mm; ultra-high-pressure valves are mostly small-diameter (DN15~50mm).
3. Temperature Parameters
   • Applicable Temperature: Generally -29~425; special high-temperature types can reach 570~620; low-temperature types can go down to -75~-196.
4. Connection Methods
   • Flange connection, butt-weld connection, threaded connection, clamp connection. Butt-weld and high-pressure flange connections are mainly used for high-pressure working conditions.
5. Actuation Methods
   • Manual, electric, pneumatic, hydraulic, worm gear drive, etc.
6. Applicable Standards
   • National standards: GB/T 12235, GB/T 24925, GB/T 13927
   • American standards: API 6D, API 6A, ASME B16.34

MAIN COMPONENT MATERIALS

1. Valve Body / Bonnet (Pressure-bearing Parts)
   • Forged carbon steel: A105, 20#, suitable for medium-to-high pressure, non-corrosive media
   • Chrome-molybdenum alloy steel: F11, F22, F91, 1Cr5Mo, 12Cr1MoV, high-temperature resistant and anti-creep, used in power station high-temperature and high-pressure working conditions
   • Stainless steel: F304, F304L, F316, F316L, resistant to general corrosion, suitable for chemical and oil & gas scenarios
   • Special alloys: Hastelloy C-276, Monel alloy, titanium alloy (TA2/TC4), used in extreme working conditions of strong corrosion, high temperature and high pressure
2. Sealing Surface / Trim
   • Hard alloys: Stellite, nickel-based alloys, surfacing treatment, wear-resistant, erosion-resistant, and high-temperature resistant
   • Stainless steel: 410, 420, 2Cr13, with certain strength and corrosion resistance
   • Engineering ceramics: Zirconia, silicon carbide, ultra-hard and wear-resistant, suitable for high-particulate media
3. Sealing Elements / Packing
   • Metal seals: Copper, aluminum, soft steel, stainless steel coated gaskets, used for ultra-high pressure and high temperature
   • Polymer materials: Reinforced PTFE, PPL, PEEK, fluoroelastomer (FKM), with excellent temperature resistance, corrosion resistance, and sealing performance

PRODUCT FEATURES

• High-strength structural body adopts forging technology with dense and defect-free material, thickened wall, and strong resistance to high-pressure deformation and impact.
• High-reliability sealing mainly adopts metal hard seal or metal + reinforced soft seal. Some designs use pressure self-sealing structures, where the higher the medium pressure, the tighter the seal, resulting in extremely low leakage rate (up to ANSI Class V~VI level).
• Anti-fatigue and long service life: Key components undergo special heat treatment and surface strengthening, with resistance to high-pressure alternating loads, erosion, and corrosion. The design service life far exceeds that of ordinary valves.
• Stable opening/closing valve stem and high-strength closing components with precise fit, controllable switching torque, stable operation without jamming under high pressure.
• Strong adaptability to working conditions, suitable for water, steam, oil & gas, strong corrosive media, slurry, liquid metal and other fluids, compatible with extreme environments such as high temperature, low temperature, high pressure difference, and strong wear.