Full Bore Carbon Steel Worm Gear Trunnion Welded Ball Valve for Thermal

Product Attribute: Port Size:customizable
structure:BALL
application:General
power:Manual
customized support:OEM, ODM, OBM, Software reengineering
temperature of media:Medium Temperature
media:Water oil gas
Stem:2Cr13, blow-out proof structure
Seat:PTFE+C, zero leakage
Test:API 598 and API6D is available
Life:same as the pipeline

INFO@TYFLUIDGROUP.COM

Product Overview

TIANYU Full-Bore Carbon Steel Worm Gear Gate Valve: Efficient Control Solution for Industrial Pipeline Systems

I. Technical Overview

TIANYU full-bore carbon steel worm gear gate valve is specially designed for industrial pipeline systems, constructed with WCB carbon steel, covering DN50~DN600 (2″~24″) in size, PN16~PN40 (1.6~4.0MPa) in pressure rating, and operating from -29℃~425℃. Suitable for non-corrosive media like water, steam, and oil, the valve features a rising stem yoke structure with a worm gear reduction mechanism for 70% torque reduction, enabling 90° quick on/off. The full-bore design achieves a flow resistance coefficient ≤0.15, 15% more energy-efficient than conventional gate valves, widely used in main pipelines for power, metallurgy, papermaking, and municipal sectors.

II. Core Product Features

(A) Full-Bore Design Advantages

Unobstructed Flow Path: Valve ID matches pipeline ID for zero restriction, reducing turbulence and pressure loss, lowering pump power demand;
Anti-Clogging Capability: Smooth flow path without steps or dead corners prevents particle deposition, ideal for industrial wastewater with suspended solids;
Flow Characteristics: Equal percentage flow curve with ±5% regulation accuracy, outperforming conventional gate valves’ ±10%.

(B) Worm Gear Drive System

Torque Amplification: Worm gear reduction ratio 1:10~1:40 reduces operating torque by 70%, with DN300 valve requiring ≤120N force;
Precision Control: Worm gear self-locking prevents misoperation, positioning accuracy ±0.5°, suitable for frequent adjustment;
Protection Class: Cast aluminum housing with powder coating, IP67 protection for long-term use in wet, dusty environments.

(C) Pressure Sealing Structure

Component	Material	Performance Advantages
Body/Bonnet	WCB carbon steel (A216-WCB)	Tensile strength ≥485MPa, -29℃~425℃ temperature adaptability
Disc	1Cr13 stainless steel	STL hard alloy overlay, HRC45-50 hardness, wear-resistant
Stem	2Cr13 stainless steel	Trapezoidal thread accuracy 6H, quenched & tempered (HB220-250)
Sealing Face	Flexible graphite + stainless steel spiral wound gasket	Rebound rate ≥40% at high temperature, compliant with ASME B16.20

III. Key Technical Attributes

Parameter Category	Specifications	Expansion Options
Size Range	DN50~DN600 (2″~24″)	Custom DN700~DN1200 (negotiable)
Pressure Rating	PN16, PN25, PN40	American Standard Class 150~Class 300 (optional)
Connection Type	Flange (GB/T 9113, ANSI B16.5)	Buttweld (BW), wafer-type customization
Operation Method	Worm gear drive	Electric (220V/380V), pneumatic (0.4~0.7MPa)
Compliance Standards	GB/T 12234, API 600	ISO 5211, CE, fire certification (API 6FA)

IV. Manufacturing Processes & QC

(A) Precision Casting & Machining

Body Forming:
- Resin sand casting with ±1mm wall thickness uniformity, UT-tested for internal defects (sensitivity ≥Φ2mm);
- High-temperature annealing to relieve stress, hardness controlled at HB120-180.
Disc Machining:
- CNC gantry milling for sealing face with flatness error ≤0.05mm, surface roughness Ra≤1.6μm;
- STL hard alloy overlay thickness ≥2mm, uniform metallographic structure without cracks.
Assembly Process:
- Stem straightness ≤0.05mm/m, connection gap with disc ≤0.03mm;
- 1.5x nominal pressure hydrostatic test (15-min hold), 1.1x air pressure seal test (leakage ≤0.1NL/min) for each valve.

(B) Quality Assurance System

Material Traceability: Key components traceable to melt heat number and heat treatment records, with chemical composition reports (third-party PMI testing);
Life Testing: Sampled for 10,000 cycles with ≥98% sealing retention (industry standard: 5,000 cycles);
Surface Treatment: Valve body sandblasted to Sa2.5, epoxy coating thickness ≥200μm, 1000-hour salt spray test without corrosion.

Valve Details

Application

V. Application Scenarios

Power Industry: Main steam pipeline (4.0MPa/400℃) on/off control in power plants, full-bore design reduces pressure loss for higher power efficiency;
Metallurgy Industry: Blast furnace gas pipeline (0.2MPa/200℃) isolation, hard alloy sealing face resists erosion, service life >5 years;
Papermaking Industry: Pulp transportation pipeline (0.8MPa/100℃) regulation, smooth flow path prevents fiber deposition, reduces maintenance frequency;
Municipal Water Supply: Urban water main (1.6MPa) flow control, worm gear drive enables easy operation for frequent adjustment.

VI. TIANYU Customization Advantages

With 15 years of industrial valve expertise and smart factory capabilities, TIANYU offers comprehensive customization:

In-Depth Technical Customization: Supports non-standard pressure (PN63/PN100), special temperatures (-40℃~550℃), long-life sealing (50,000 cycles), and special connections (JIS/KSD flanges), with CFD flow analysis reports;
Rapid Delivery System: 30-day standard lead time, 15-day turnaround for small batches (MOQ 10 units), 72-hour response for urgent orders;
Global Service Network: 18-month warranty, 24/7 support from 3 major service centers (APAC/Europe/NA), 48-hour airfreight for critical spares, with digital installation guidance and intelligent monitoring solutions.