High Halliburton Manual Plug Valve Actuator Non-Stainless Steel Resun Inverted Pressure Balance for Water Media

Specification

TIANYU Manual Back Pressure Balanced Lubricated Plug Valve: Core Industrial Fluid Control Solution

I. Product Overview

TIANYU manual back pressure balanced lubricated plug valves are designed to API 6D and ANSI B16.34 standards, integrating an inverted pressure balancing structure with a forced lubrication system for low-torque operation and bi-directional sealing under high-pressure conditions. Available in WCB cast steel, stainless steel, and other materials, these valves suit media environments from -20℃ to 425℃, widely applied in shut-off and regulation of industrial fluids like water, oil, and gas.

II. Key Attribute Parameters

Technical Specifications
- Bore Range: DN50~DN600 (2″~24″)
- Pressure Classes: Class 150~Class 2500 (PN16~PN420)
- Design Standards: API 6D, ANSI B16.34
- Flange Standards: ANSI B16.5 (RF face), ANSI B16.25 (butt-weld ends)
- Testing Standard: API 598 (shell strength and seal testing)
Material Configuration
- Body/Bonnet: WCB (cast steel), LCB/LCC (low-temperature steel), CF8/CF8M (stainless steel)
- Plug: Forged alloy steel (surface hardened, HV≥280)
- Sealing System: Metal hard seal + PTFE auxiliary seal, brass lubrication passage
- Actuators: Manual handwheel, gear drive, electric actuator (optional)
Performance Parameters
- Shell Test Pressure: 1.5×rated pressure (3.0MPa for Class 150)
- Seal Test Pressure: 1.1×rated pressure (bi-directional zero leakage, API 598 Class VI)
- Operating Torque: ≤180N·m for DN100 valve (manual handwheel)

Product Overview

III. Structural Design & Technical Features

Back Pressure Balanced Structure
- A balancing piston at the plug base counteracts axial load using medium pressure, reducing operating torque by 50% and resolving jamming in high-pressure applications. The balancing chamber connects to the medium channel, automatically compensating for pressure fluctuations to ensure stable operation in Class 900 systems.
Forced Lubrication Sealing System
- A circular lubrication groove between the body and plug injects NLGI 2# lithium-based grease via a high-pressure grease valve, forming a dynamic sealing film (sealing specific pressure ≥15MPa) while minimizing friction wear. Grease isolates media from metal surfaces, preventing scaling and corrosion to extend valve life beyond 100,000 cycles.
Bi-Directional Flow & Multi-Environment Adaptability
- Symmetric flow path eliminates the need to distinguish media direction, suitable for bi-directional shut-off in heat exchanger inlets/outlets and tank connecting pipes. Supports low-temperature (-20℃) to medium-high temperature (425℃) conditions, optimized via material combinations for diverse media characteristics.

IV. Manufacturing Processes & Quality Control

Core Technologies
- Body Casting: Resin sand casting (WCB) or investment casting (stainless steel) ensures dimensional accuracy CT6, with critical areas ultrasonically tested (UT) for no shrinkage defects.
- Plug Machining: CNC lathe precision turning followed by grinding polishes sealing surfaces to flatness ≤0.01mm, with fit clearance to body controlled at 0.05~0.1mm for high-pressure sealing.
- Surface Treatment: Cast steel parts coated with epoxy resin (thickness ≥120μm); stainless steel components passivated, passing 500-hour salt spray test.
Quality Certification System
- Certifications: ISO 9001, CE (PED 2014/68/EU), API 6D (optional)
- Testing Procedures:
  - 100% shell strength test (5-min hold, no leakage)
  - Bi-directional seal test (15-min hold, leakage rate ≤1×10⁻⁹m³/s)
  - Torque fluctuation test (≤10% deviation at ambient temperature)

Valve Details

V. Core Product Advantages

Advantage Dimension	Technical Details & Application Value
High-Pressure Sealing Reliability	Back pressure balance + lubrication design enables 100,000 leak-free cycles in Class 1500 systems, increasing service life by 40% vs. traditional plug valves.
Low Maintenance Cost	Online grease replenishment eliminates disassembly, reducing maintenance time by 60% and downtime losses by 30%.
Wide Temperature Adaptability	Low-temperature steel (LCB) suits -46℃; high-temperature steel (WC9) works at 425℃, adapting to full-temperature industrial scenarios.
Operation Convenience	Manual torque is 35% lower than similar products; DN200 valves feature force-saving handwheel mechanisms for single-person operation.
Total Life Cycle Cost	≥80,000 cycles (API 598 standard) with 30% lower comprehensive cost than ball valves, ideal for long-term continuous operation.

Application

VI. Application Fields & Scenarios

Water and Municipal Engineering
- Urban high-pressure water transmission (DN300~DN600): Back pressure balance reduces water hammer effects, flow resistance coefficient ≤0.7;
- Wastewater treatment sludge pipelines: Lubrication system prevents fibrous debris jamming, reducing maintenance frequency by 50%.
Oil & Gas Industry
- Wellhead equipment, gathering pipelines (Class 300~Class 2500): Resists oil-gas erosion, bi-directional sealing prevents blowout risks;
- LNG receiving station cryogenic pipelines (-196℃ custom model): LCB material with PTFE seals ensures cryogenic sealing.
Chemical & Energy Sectors
- Reactor feed control: Stainless steel (CF8M) resists acid-base media (pH 2~14), meets FDA certification;
- Thermal power plant steam pipelines (425℃/10MPa): WC9 material resists high-temperature oxidation, outlasting gate valves by 2+ times.
Metallurgy & Mining
- Blast furnace gas pipelines: Sulfur-resistant design (316L) for H₂S-containing media (≤100ppm);
- Mineral slurry systems: Wear-resistant plug surface handles 20% solid concentration, wear rate ≤0.05mm/1000 cycles.