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High Temperature and Pressure Resistant Gearbox Globe Valve

Buy the High Temperature and Pressure Resistant Gearbox Globe Valve directly from Hanno Valve, a certified specialized manufacturer. Engineered for severe thermal power and coal chemical lines, this valve pairs high-temperature alloy steel with a heavy-duty reduction gearbox to combat thermal growth and prevent binding. Built to withstand extreme thermal and mechanical stresses, it ensures smooth stem movement and tight, leak-free shutoff under critical operating regimes.

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Product Description

The High Temperature and Pressure Resistant Gearbox Globe Valve by Hanno Valve is engineered with 13Cr hardfaced seating interfaces and a heat‑treated 2Cr13 stainless stem. The valve utilizes high‑purity die‑formed graphite packing and an SS304+graphite composite joint gasket that retains elasticity under continuous thermal cycling up to 425°C (and higher for alloy variants). Cast in our 18,000㎡ plant using advanced precoated sand molds, each valve shell undergoes low‑temperature impact testing, spectrographic verification, and NDT flaw detection. Certified with API 600, ISO14001, Russia TC 010/032, and TS licenses, Hanno Valve delivers proven severe‑service reliability to power groups like China Huadian and global energy contractors.

Engineering Advantages

Thermal Expansion Clearance Engineering: Stem‑to‑disc clearance and thread tolerances are calculated to accommodate differential thermal expansion, preventing high‑temperature stem lockup.
Hardfaced Anti‑Galling Trim: 13Cr cobalt‑base alloy overlay on seats prevents metal galling, erosion, and wire‑drawing under high‑velocity steam expansion.
Low‑Fugitive Emission Sealing: Die‑formed pure graphite packing rings with anti‑extrusion braided end rings maintain seal integrity at elevated temperatures.

Technical Specifications

Parameter	High Temperature and Pressure Resistant Gearbox Globe Valve Specification	Part No. & Material
Design Standards	API 600, ASME B16.34, EN 13709	1. Valve Body: Alloy Steel / Cast Steel 25L
Temperature Rating	‑29°C up to 425°C (550°C for Alloy)	2 / 9. Seat Overlay: 13Cr Hardfacing
Pressure Rating	Class 300 to Class 1500 / PN40 to PN250	4. Stem: 2Cr13 Stainless Steel
Testing Standards	API 598, EN 12266‑1	5. Gasket: SS304 + High‑Purity Graphite
Actuator Type	Heavy‑Duty Gear Drive Unit	10. Packing: Die‑Formed Graphite Rings

Extreme Service Applications

Superheated Steam Lines: Main steam isolation and superheater drain valves in coal‑fired power plants.
Coal Gasification Units: High‑temperature coal gas synthesis and cracking lines (China Shenhua Group).
Thermal Energy Storage: High‑temperature heat transfer fluid loops in solar thermal plants.

Certifications & Quality Control Package

Certifications: API 600, ISO9001, ISO14001, CE, TS License, Russia TC 010/032.
In‑House Testing: Low‑temperature impact testing, spectral analysis, ultrasonic flaw detection, and high‑temperature hydrostatic testing.
Documentation: EN 10204 3.1 material test report, non‑destructive test (NDT) reports, certificate of conformity.

Shipping, Packaging Support

Export Packaging: Wrapped in heavy moisture‑barrier film, cushioned with shock‑absorbing foam, and packed in reinforced seaworthy wooden crates.
Technical Guidance: Includes complete installation, commissioning, torque‑tightening guidelines, and operational maintenance manuals.
Warranty Guarantee: 18 months from shipment with full factory technical response within 24 hours.

Frequently Asked Questions (FAQ)

What is the maximum temperature rating for this gearbox globe valve?

Standard High Temperature and Pressure Resistant Gearbox Globe Valve handles up to 425°C, while alloy steel options (e.g., WC6/WC9) handle up to 550°C+.

How do you prevent stem seizure at elevated operating temperatures?

Stem threads and stem‑disc connections feature precise thermal expansion gaps and 2Cr13 stainless material to guarantee smooth operation under thermal growth.