Low Temperature Carbon Steel GOST Globe Valve for Extreme Cold

Engineered for arctic gas compression skids and Siberian distribution networks, Hanno's Low Temperature Carbon Steel GOST Globe Valve for Extreme Cold a 20GML cast body with an A105+13Cr hardfaced disc. High-tensile brass stem nuts and GCr15 ball bearings reduce manual operating torque during sub-zero startups, supported by Russia TC 010/032 EAC certification.

Performance Specifications

Low-Torque Freezing Weather Drive System Mechanics

Sub-zero ambient conditions create severe drive problems for outdoor industrial valves. Metal thermal contraction causes standard steel stem bushings to bind inside bonnet yokes, requiring excessive force that strips stem threads or bends handwheel spokes. Hanno Low Temperature Carbon Steel GOST Globe Valve for Extreme Cold solves cold-weather actuation challenges through specialized mechanical drive engineering:

• Dissimilar Metal Thermal Expansion Bushing: Hanno installs precision-machined brass stem nuts (Part #16) inside the ductile iron yoke. Because brass features a higher coefficient of thermal expansion than the 2Cr13 stainless stem, the bushing maintains smooth thread clearance as temperatures plunge to -60°C, preventing stem seizure and galling.

• Rolling-Contact Thrust Bearing Assembly: Operating a globe valve against high differential pressure in freezing weather requires high torque. Hanno integrates heavy-duty upper and lower GCr15 chrome steel ball bearings (Part #15) inside the stem nut housing. This rolling-element construction absorbs axial stem thrust, reducing handwheel opening torque to 3% and closing torque to 10% compared to conventional un-bearing globe valves.

• Live-Loaded Stem Packing System: Extreme cold causes packing ring contraction, leading to stem leaks. Hanno uses die-formed flexible graphite packing rings compressed by live-loaded Belleville spring washers. This maintains constant linear packing compression during extreme ambient temperature fluctuations down to -60°C.

Cold-Climate Field Installations

• Siberian Natural Gas Processing: Wellhead collection manifolds, gas dehydration skids, and compressor station bypass loops (Rosneft suppliers).

• Extreme Cold Pipeline Terminals: Export terminals, metering skids, and tank farm isolation manifolds across Northern Eurasia (SOCAR projects).

• Low-Temperature Petrochemical Utilities: Chilled hydrocarbon lines, LPG loading racks, and cold utility isolation networks.

Frequently Asked Questions (FAQ)

Can these valves be equipped with extended stems for underground arctic installations?

Yes, Hanno manufactures custom stem extensions to elevate handwheels, gearboxes, or electric actuators above soil or insulation layers.

How does Hanno Low Temperature Carbon Steel GOST Globe Valve for Extreme Cold verify seat tightness on low-temperature valves before shipment?

100% of finished valves undergo high-pressure hydrostatic shell/seat tests and low-pressure air seat testing per GOST 9544 leakage class specifications.

Are material test reports for 20GML castings supplied with orders?

Yes, every order includes EN 10204 3.1 Material Test Certificates detailing heat numbers, chemical analysis, Charpy V-notch impact values, and pressure test logs.