High Temperature High Pressure Resistance Manual Valve Stainless Steel Flange Globe Valve for Oil Water Pipeline

Product Attribute: port size:2″-12″
application:General
power:Manual
customized support:OEM, OBM
temperature of media:Normal/High/Low/Medium Temp
brand name:tianyu
Bonnet Material:316 Stainless Steel
Disc Material:316 Stainless Steel
Product name:Globe valve
Body material:Stainless Steel
Material:Stainless Steel 304/316
Connection:Flange Ends

INFO@TYFLUIDGROUP.COM

Specification

Solution

I. Product Overview

TIANYU high-temperature high-pressure globe valves comply with ASME B16.34 and GB/T 12235 standards, constructed from A105 forged carbon steel and WC6/WC9 cast steel for extreme conditions. The lift-type disc enables precise cutoff and flow regulation, covering DN15-DN300 (1/2″-12″) with Class 150-Class 2500 (PN20-PN420) pressure ratings and -29℃~600℃ temperature range, suitable for steam, hot oil, and syngas in petrochemical, power, and metallurgical industries.

II. Core Technical Parameters

Specifications & Operating Range
- Nominal Diameter: DN15/20/25/40/50/80/100/150/200/250/300 (1/2″-12″)
- Pressure Class: Class 150/300/600/900/1500/2500 (PN20/PN50/PN100/PN150/PN260/PN420)
- Temperature Range: -29℃~425℃ (A105 carbon steel), -29℃~600℃ (WC9 cast steel)
Materials & Sealing System
- Body/Bonnet: A105 forged carbon steel (tensile strength ≥485MPa), WC6/WC9 cast steel (high-temperature strength ≥240MPa@550℃)
- Disc/Seat: STL6 hard alloy overlay (HRC58-62), sealing surface roughness Ra≤0.2μm
- Packing: Flexible graphite braided packing (resists 600℃) + metal wound gasket, leakage rate ≤1×10⁻⁶cc/s (API 598)
- Connections: Flanged (RF/RTJ face, ASME B16.5), butt-welded (BW, ASME B16.25)
Actuation & Operation
- Actuation: Manual (gearbox standard), electric (explosion-proof actuator), pneumatic (piston cylinder)
- Operating Torque: DN100 manual ≤180N·m, electric actuation time ≤15s (Class 600)
- Protection Grade: IP67 (body), Ex d IIB T6 (explosion-proof electric)

Product Overview

III. Structural Design & Technical Features

High-Temp/Pressure Seal Optimization
- Wedge disc design: 5° taper self-seals via medium pressure, sealing specific pressure ≥30MPa for bidirectional bubble-tight performance.
- Double-layer packing: Inner flexible graphite resists high-temperature creep, outer metal ring enhances support to prevent packing failure.
Material Reliability Engineering
- Forging/casting process: Forged body eliminates internal defects; cast steel normalized at 950℃ + tempered at 720℃, grain size refined to Grade 5.
- Stem enhancement: 25Cr2MoV alloy steel quenched & tempered (HB240-280), STL overlay resists high-temperature oxidation wear.
Hydrodynamic Optimization
- Streamlined flow path: Pressure drop reduced by 20% vs. conventional globe valves (DN100 Cv=25), minimizing energy loss under high pressure.
- Balanced disc: Reduces on-off resistance, suitable for max pressure differential 15.0MPa (Class 2500).

IV. Manufacturing Processes & Quality Control

Precision Fabrication Flow
- Body forging: A105 ingot die-forged under 3000 tons, 100% ultrasonic tested (UT), defect size ≤Φ1mm.
- Seal surface treatment: STL alloy plasma-overlaid, aged at 550℃ to eliminate stress, sealing surface flatness ≤0.005mm.
High-Temp Performance Testing
- Hydrostatic test: 1.5x shell pressure (e.g., 15.0MPa for Class 600) held for 30min, 1.1x sealing pressure with zero leakage.
- Thermal cycle test: 500 cycles between -29℃~600℃, stem displacement deviation ≤0.1mm.
- Spectral analysis: C/Cr/Mo element deviation ≤0.03% per heat, traceable to heat number.
NDT System
- Body: 100% magnetic particle inspection (MPI) for surface defects.
- Welds: 100% radiographic testing (RT), compliant with ASME BPVC Section V.

Valve Details

V. Core Product Advantages

Extreme Condition Adaptability
- Petrochemical cracking unit: WC9 body resists 600℃ steam, STL seat wear ≤0.05mm/year under high-velocity scouring.
- Nuclear power conventional island: A105 forged body passes 1000h high-temperature creep test (550℃/180MPa) without plastic deformation.
- Metallurgical blast furnace: Class 2500 rating suits high-pressure nitrogen pipelines, anti-surge design reduces valve vibration.
Long-Term Operation Assurance
- Replaceable seat design: On-site maintenance time reduced by 50%, minimizing downtime losses.
- Maintenance-free cycle: 8000 operations without leakage, 25% longer than similar products, saving $1500/year per DN200 valve.
Global Certification Support
- Certified to API 600, CE-PED 2014/68/EU, NACE MR0175.
- Provides high-temp/high-pressure test reports, Material Test Reports (MTR), and third-party inspection services.

Application

VI. Application Fields & Cases

Refinery FCC unit: DN200 Class 900 globe valve controls 520℃ regenerated flue gas, 6-year stable sealing, SIL 3 certified.
Supercritical power plant: DN150 Class 2500 valve regulates 25MPa high-pressure feedwater, stem guide prevents high-temp jamming, annual leakage ≤0.5L.
Coal chemical project: DN50 Class 600 valve in 380℃, 8.0MPa syngas, anti-static design (ground resistance ≤10Ω) meets ATEX.

VII. Installation & Maintenance Guide

Installation: Install vertically, align media flow with body arrow; use 35CrMoA alloy bolts for high-temp applications (torque per ASME PCC-1).
Routine Maintenance: Check packing temperature (≤60℃) quarterly, replace high-temp grease (molybdenum disulfide base, dropping point ≥300℃) annually.
Troubleshooting: For minor seal leakage, evenly tighten gland bolts online (torque increase ≤15%) without system depressurization.