Description
Control Globe Valves (throttling globe control valves) are heavy-duty, high-precision flow regulation valves specifically engineered for steam, thermal fluid, high-pressure gas, and liquid pipelines. Featuring cage-guided or parabolic plug design, these valves deliver accurate linear or equal-percentage flow characteristics, making them essential for automated continuous throttling and tight shut-off.
Designed for severe process control, these valves work in synergy with our industrial butterfly valves and mount securely to high-pressure lines using precision forged industrial flanges.
Technical Specifications
| Technical Parameter | Specification Details |
|---|---|
| Nominal Diameter Range | DN15 to DN400 (1/2" to 16") |
| Nominal Pressure | PN16 / PN40 / PN64 / PN100 / Class 150 to Class 2500 |
| Body & Bonnet Material | WCB (Carbon Steel), WC6, WC9, CF8 (304 SS), CF8M (316 SS) |
| Trim Design | Parabolic Plug / Cage-Guided / Anti-Cavitation & Low-Noise Trim |
| Flow Characteristic | Equal Percentage (EQ%), Linear, Quick-Opening |
| Working Temperature | -196°C to 560°C (-320°F to 1040°F) |
| Connection Standard | Flanged End (ASME B16.5, EN 1092-1) / Butt-Welded (BW) |
| Actuation Options | Pneumatic Diaphragm Actuator (4-20mA positioner) / Intelligent Electric Linear Actuator |
Key Features & High-Pressure Throttling Performance
Due to its linear motion and S-shaped flow path, control globe valves excel in demanding pressure-drop and severe service conditions:
- Superior High-Differential Throttling: Cage-guided and balanced plug options stabilize stem movement, eliminating vibration, flutter, and excessive wear caused by high differential pressures.
- Anti-Cavitation & Noise Reduction: Multi-stage pressure-drop cages suppress flashing, cavitation erosion, and hydrodynamic noise in boiler feed and high-velocity gas lines.
- Class IV / Class V / Class VI Tight Shut-Off: Precision-ground seating surfaces (Stellite hard-faced) offer low leakage rates up to Class VI soft seating for critical safety applications.
Target Applications & Industries
Our control globe valves are extensively installed in automated thermal and chemical systems:
- Power Plants & Steam Systems: Main steam pressure reduction, boiler feedwater control, and turbine bypass systems.
- Petrochemical & Refining: High-pressure gas throttling, furnace feed lines, and thermal oil loops.
- Chemical Processing: Precise acid/alkali flow dosing, reactor temperature regulation, and high-pressure liquid lines.
Frequently Asked Questions (FAQ)
Q1: What is the difference between cage-guided and top-guided control globe valves?
Top-guided valves are compact and suitable for general clean fluid throttling; cage-guided valves offer superior stability, higher pressure-drop capability, and easy replacement of internal trim for abrasive or cavitating fluids.
Q2: How are pneumatic diaphragm actuators selected for fail-safe modes?
We provide single-acting pneumatic diaphragm actuators supporting either Air-to-Open (Fail-Closed) or Air-to-Close (Fail-Open) operations to meet exact plant safety protocols during air supply failure.
Q3: Can Oucang Valve calculate flow coefficient (Cv) and assist with valve sizing?
Yes. Oucang Valve provides technical sizing support, calculating flow coefficient (Cv), velocity, and noise levels based on your operating pressure, temperature, and fluid medium.
About the Manufacturer: Oucang Valve
Oucang Valve is an ISO-certified direct manufacturer specializing in severe-service control valves, globe valves, and forged pipe flanges. Operating our own casting workshop, CNC machining facility, and flow calibration rig, we offer full material traceability, hydro testing, and custom OEM engineering.
- Core Capability: Cage trim custom machining, high-temperature alloy overlay, Cv calculation support, and fast direct global delivery.
- Quality Compliance: ASME B16.34, API 600, EN, DIN, and ISO standards.
- Factory Inquiry: Contact our engineering sales team for direct factory quotations, sizing sheets, and 2D/3D CAD drawings.
