As Arpon Industrial, we represent Hydracell and OBL brands in Turkey. Both brands have proven their reliability in the most demanding applications across various sectors for many years, providing high-quality products with a wide range of options. Hydracell specializes in the production of seal-less multi-diaphragm high-pressure pumps, while OBL specializes in dosing pumps. Both brands offer pump solutions compliant with API 675 and ATEX standards, playing a significant role in ensuring high safety and efficiency in industrial facilities and projects.
About the API 675 Standard
API 675 is a standard established by the American Petroleum Institute that defines the design, manufacturing, and performance criteria for dosing pumps. This standard ensures that pumps can dosage liquids with high accuracy, withstand high pressures, incorporate safety features, require low maintenance, and have a long service life. API 675 specifically guarantees the use of safe and efficient dosing pumps in chemical, water treatment, and industrial applications.
Three Key Criteria
- Deviation (±1%)
- Definition: Deviation is the ability of a pump to maintain the correct flow rate while operating in a steady and stable condition. The pump should operate with a deviation of ±1% from the target flow rate during operation.
- Meaning: This means that, under steady operating conditions, the pump's actual flow rate should not deviate by more than 1% from the target flow rate. This criterion guarantees accurate fluid dosing in sensitive applications such as chemical dosing or liquid transfer.
- Linear Performance (Linearity) (±3%)
- Definition: Linear performance is the ability of a pump to adjust flow rate linearly in response to a control input (e.g., motor speed, stroke length, or valve opening rate). The flow rate must vary linearly across all values within the adjustment range.
- Meaning: The pump's flow rate should increase or decrease linearly, consistent with the control parameters. The allowable deviation in linear performance is typically ±3% , meaning the flow rate should not deviate more than 3% from the ideal linear response.
- Repeatability (±3%)
- Definition: Repeatability refers to a pump's ability to consistently deliver the same flow rate under the same operating conditions. Adjustments made under the same conditions guarantee that the pump will repeatedly deliver the same flow rate.
- Meaning: When the same setpoint or control input is applied repeatedly, the pump must deliver the same flow rate each time. The allowable deviation for repeatability is ±3% , meaning the pump should not deviate more than 3% from the target value each time it is applied under the same conditions. This ensures reliable performance in continuous or cyclical operation.
