I. Product Introduction
The oil sampling valve is a specialized fluid control component designed for safe, efficient, and contamination-free collection of oil samples from industrial systems. As a core tool in preventive maintenance, it enables technicians to obtain representative samples of lubricating oil, engine oil, transmission fluid, and hydraulic fluid without shutting down operating equipment — a critical advantage for maintaining continuous production and accurate condition monitoring.
Unlike traditional sampling methods (such as drain plug sampling or vacuum pumping), this valve eliminates the risk of external contamination entering the system during sampling and ensures the collected sample reflects the true condition of all components in the fluid circuit. It is widely applied in mobile construction equipment, military vehicles, trucks, stationary industrial machinery, turbines, and compressors, providing reliable data support for oil analysis (including wear particle detection, moisture content testing, and viscosity analysis).
Key design concepts focus on operability, durability, and compatibility with diverse working environments. Whether installed in low-pressure return lines or pressurized fluid circuits, the valve maintains consistent performance to support predictive maintenance strategies and extend equipment service life.
II. Product Features
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Non-Shutdown Sampling: Enables inline sampling during equipment operation without interrupting production processes. For optimal results, installation in dynamic fluid lines (preferably return lines upstream of filters) ensures the sample is representative of the entire system’s fluid condition. This feature reduces downtime costs and improves maintenance efficiency compared to traditional methods.
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Contamination Prevention: Adopts multiple anti-contamination designs, including metal dust covers for discharge ports, minimal deadzone volume (less than 1ml for some models), and flushable internal channels. Before sampling, discharging approximately 200ml of fluid flushes residual stagnant oil, ensuring the collected sample is free from cross-contamination or stagnation effects. Double-seal construction (e.g., Vitonâ„¢ or Buna-N seals) further prevents external impurities from entering the system during operation.
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Easy and Intuitive Operation: Two mainstream operation modes cater to different scenarios: knob-type (1/4 turn to the right to discharge fluid, automatic closure when released) and push-button type (one-button sampling for rapid collection). The knurled knob design allows throttling of flow rate, while some models feature a 360° rotatable spout for flexible positioning of sampling bottles — ideal for tight installation spaces. No specialized tools are required for routine sampling, reducing training costs for operators.
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Rugged and Corrosion-Resistant Construction: The valve body uses corrosion-resistant plated steel or stainless steel, with internal components (such as spouts, springs, and buttons) made of brass or stainless steel for enhanced durability. Seals are crafted from high-performance materials like Vitonâ„¢ (resistant to high temperatures and chemical degradation) or Buna-N, ensuring stability in harsh environments such as high humidity or chemical exposure.
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Wide Pressure and Temperature Adaptability: Designed to operate across a broad range of working conditions. Sampling pressure ranges from 5 psi (0.34 bar) to 750 psi (51.7 bar) for standard models, with maximum operating pressure reaching up to 6,000 psi (413.7 bar) for high-pressure applications. Temperature resistance spans from -65°F (-54°C) to 400°F (204°C), adapting to both cold outdoor environments and high-temperature industrial settings.
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Versatile Compatibility: Available in multiple connection specifications, including 1/8″ NPT, 1/4″ NPT, 1/4″ BSPT, and 7/16-20 male ORB threads, ensuring compatibility with different pipeline standards. It is compatible with various fluid types, including engine oil, lubricating oil, transmission fluid, and hydraulic fluid, meeting the needs of diverse industries.
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High Safety and Reliability: Meets strict industry standards (e.g., military spec MIL-V-81940/2-1 for some models) with a minimum burst pressure 4-8 times the operating pressure (e.g., 1200 psi burst pressure for 50-300 psi operating pressure models). Automatic positive closing and zero-leak performance prevent fluid leakage and ensure operator safety during sampling.
III. Technical Data
Note: The following parameters cover mainstream models; specific values may vary by product series. For customized specifications, refer to the product nameplate or contact the manufacturer.
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Technical Parameter
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Knob-Type Model (e.g., HC-FD15)
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Push-Button Model (e.g., KP Series)
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Inlet Port Size/Thread Type
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7/16-20 Male ORB
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1/8″ NPT, 1/4″ NPT, 1/4″ BSPT (male)
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Sampling Pressure Range
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50-300 psi (3.5-20.7 bar)
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5-750 psi (0.34-51.7 bar)
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Maximum Operating Pressure
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300 psi (20.7 bar)
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6,000 psi (413.7 bar)
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Minimum Burst Pressure
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1200 psi (82.8 bar)
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24,000 psi (1654.7 bar)
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Operating Temperature Range
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-65°F to 275°F (-54°C to 135°C) (Buna-N seal)
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-15°F to 400°F (-26°C to 204°C) (Viton seal)
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Body Material
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Corrosion-resistant plated steel
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Stainless steel
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Internal Components
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Brass
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Stainless steel (buttons, spouts, springs)
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Seal Material
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Vitonâ„¢ or Buna-N
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Viton
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Minimum Particle Restriction
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500 micron
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500 micron
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Operating Torque (Knob-Type)
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Maximum 10 in·lb
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N/A (push-button operation)
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Deadzone Volume
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≈200ml (flush volume)
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Less than 1ml
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Dimensions (L×W×H)
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3×1.5×1 inch
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Varies by thread size (compact T-shaped design)
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Weight
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0.33125 lbs
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Varies by model (typically <0.5 lbs)
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Compliance Standards
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MIL-V-81940/2-1
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Industrial fluid control standards
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