KJ GROUP KJ-VF Series Vacuum Pump Inlet Filter
| Brand | KJ GROUP |
|---|---|
| Origin | Liaoning, China |
| Manufacturer Type | Authorized Distributor |
| Product Origin | Domestic (China) |
| Model | KJ-VF Series |
| Pricing | Available Upon Request |
Overview
The KJ GROUP KJ-VF Series Vacuum Pump Inlet Filter is an engineered filtration solution designed for integration into vacuum systems where particulate and condensable contaminant removal is critical to pump longevity and system stability. Installed upstream of rotary vane, diaphragm, or scroll vacuum pumps, this inlet filter operates on the principle of mechanical interception and inertial impaction—capturing solid particulates, oil mist, water vapor condensates, and process-generated debris before they enter the pump’s sensitive compression chamber. Its design adheres to fundamental vacuum hygiene standards, ensuring consistent suction performance, reduced maintenance frequency, and extended service intervals for downstream vacuum equipment. Unlike generic inline filters, the KJ-VF series incorporates a pressure-balanced housing and standardized ISO-KF or NPT threaded ports (model-dependent), enabling seamless integration into both benchtop and industrial vacuum lines operating in the rough vacuum range (10⁵ Pa to 1 Pa).
Key Features
- Modular, serviceable construction with quick-release clamping or threaded access for rapid filter element replacement—no tools required in most configurations
- High-efficiency dual-stage filtration: coarse stainless-steel mesh pre-filter + replaceable hydrophobic PTFE or sintered bronze cartridge (standard variants)
- Chemically resistant housing fabricated from anodized aluminum or 304 stainless steel, rated for continuous operation up to 80 °C and compatible with common solvents and mild corrosive vapors
- Low-pressure-drop design: typical ΔP < 0.5 kPa at 10 L/s flow rate (measured at 100 mbar absolute), minimizing impact on ultimate vacuum and pumping speed
- Compliance-ready documentation package available upon request, including material traceability (RoHS/REACH), dimensional drawings, and pressure rating certification per ISO 2852 and EN 1509
Sample Compatibility & Compliance
The KJ-VF filter is compatible with vacuum processes involving dry powders, solvent evaporation, freeze-drying (lyophilization), vacuum ovens, and thin-film deposition systems. It effectively retains particles ≥5 µm (with optional high-efficiency cartridges achieving ≥0.3 µm retention). The unit meets functional requirements aligned with ISO 8573-1:2010 Class 4 for solid particle contamination and Class 3 for water content in compressed air/vacuum streams. While not certified to UL or CE as a standalone electrical device, its mechanical design conforms to vacuum safety guidelines referenced in ASTM F2655–21 (Standard Guide for Vacuum System Safety) and supports GLP/GMP-aligned lab operations when paired with audit-trail-capable vacuum controllers.
Software & Data Management
As a passive mechanical component, the KJ-VF Series requires no firmware, drivers, or software integration. However, it is fully interoperable with digital vacuum management platforms—including Edwards nXDS, Agilent TurboVAC controllers, and Leybold Trivac D-series interfaces—when installed upstream of smart vacuum gauges or flow sensors. Maintenance logs (e.g., filter change timestamps, cumulative runtime, observed pressure differentials) can be recorded manually or imported into laboratory information management systems (LIMS) via CSV templates. Optional RFID-tagged filter cartridges (KJ-VF-RFID variant) support automated inventory tracking and predictive replacement scheduling in regulated environments compliant with FDA 21 CFR Part 11 requirements.
Applications
- Protection of rotary vane pumps in rotary evaporators and solvent recovery units
- Prevention of oil carryover and particulate ingress in freeze-dryer primary drying stages
- Filtration of reactive gas byproducts during vacuum-assisted chemical synthesis
- Contamination control in electron microscopy sample preparation chambers
- Guard filtration for vacuum furnaces handling metal oxides or ceramic precursors
- Integration into ISO Class 5–7 cleanroom vacuum manifolds requiring non-shedding media
FAQ
What filter media options are available for the KJ-VF series?
Standard configurations include sintered bronze (reusable, cleanable) and hydrophobic PTFE (single-use, 0.45 µm nominal pore size). Custom media—such as glass fiber, activated carbon composite, or acid-resistant nickel alloy—are available under OEM agreement.
Is the KJ-VF filter suitable for use with aggressive vapors like HCl or Cl₂?
Base models are not recommended for halogenated or strongly oxidizing vapors. For such applications, specify the KJ-VF-CR variant with Hastelloy C-276 housing and fluorinated elastomer seals, validated per NACE MR0175/ISO 15156.
How often should the filter element be replaced?
Replacement interval depends on process load: every 500–1,000 operating hours under light-duty lab use; every 100–200 hours in high-particulate industrial settings. Monitoring differential pressure across the unit is the most reliable indicator.
Can the KJ-VF be mounted vertically or horizontally?
Yes—its symmetrical flow path and drip-proof housing permit universal orientation. However, vertical mounting with inlet-down is preferred for condensate drainage in humid environments.
Does KJ GROUP provide calibration or validation documentation?
While the filter itself is not calibrated, KJ GROUP supplies factory test reports (leak integrity, pressure rating, material composition) and can support IQ/OQ protocols upon project-specific request.
