LOC's Bypass Fume Hood provides continuous air flow across the work surface even when the sash is closed. The fume hood features an internal, alternative opening located above the sash. This allows for a constant air volume which allows for change in the hood's face velocity.
In operation, the bypass exhaust system works automatically, in conjunction with the hood sash. The bypass adjustment is made as the sash is opened and closed creating a relatively constant air volume regardless of sash position.
Our Bypass Fume Hood
The bypass fume hood's unique design ensures optimal laboratory safety through continuous airflow management. The internal alternative opening above the sash maintains constant air volume while allowing face velocity adjustments based on sash position. This automatic operation provides reliable containment and energy efficiency across all operational conditions.
Advanced Bypass Hood Features
Continuous airflow technology engineered for optimal containment and energy efficiency
Maintains air flow across work surface even when sash is fully closed
Internal opening above sash provides alternative air pathway for constant volume
Bypass system works automatically in conjunction with hood sash movement
Maintains relatively constant air volume regardless of sash position
Allows for face velocity changes while maintaining optimal containment
Constant air volume operation reduces HVAC system demands
Continuous airflow ensures consistent containment of hazardous materials
Accommodates various laboratory procedures with different sash positions
Bypass Hood Applications & Environments
Bypass fume hoods provide essential continuous containment across diverse laboratory environments requiring flexible sash operation:
- Research Laboratories: Continuous airflow supports extended research procedures requiring various sash positions without compromising safety.
- Chemical Analysis Labs: Constant air volume maintains containment during analytical procedures with frequent sash adjustments.
- Educational Institutions: Automatic bypass operation simplifies use for students while maintaining consistent safety performance.
- Quality Control Facilities: Reliable containment for industrial testing procedures requiring flexible workspace access.
- Pharmaceutical Development: Continuous protection during drug development processes with varying equipment configurations.
- Multi-User Laboratories: Consistent performance across different user preferences and operational requirements.
Benefits of Choosing Bypass Fume Hoods
- Continuous Protection: Maintains airflow across work surface regardless of sash position for uninterrupted safety
- Energy Efficiency: Constant air volume operation reduces HVAC system load and operational costs
- Automatic Operation: Self-adjusting bypass system eliminates need for manual air volume adjustments
- Operational Flexibility: Accommodates various laboratory procedures requiring different sash positions
- Consistent Performance: Reliable containment maintained across all operational conditions and user preferences
- Reduced Complexity: Automatic bypass adjustment simplifies laboratory operations and training requirements
- Enhanced Safety: Continuous airflow prevents contamination risks during sash position changes
- Cost-Effective Operation: Constant air volume reduces energy consumption compared to variable volume systems
Technical Specifications & Performance Data
Bypass Hood Model Specifications:
| Model # | Hood Size | 100 FPM @ Full Open | 100 FPM @ 18" Open | ||
|---|---|---|---|---|---|
| Collar Size | CFM | Collar Size | CFM | ||
| B-504 | 48" | 10" Dia. | 867 | 8" Dia. | 488 |
| B-505 | 60" | 10" Dia. | 1133 | 8" Dia. | 638 |
| B-506 | 72" | 10" Dia. | 1400 | 10" Dia. | 788 |
| B-607 | 84" | 2) 10" Dia. | 1667 | 2) 8" Dia. | 938 |
| B-608 | 96" | 2) 10" Dia. | 1933 | 2) 8" Dia. | 1088 |
Static Pressure (SP) Values:
- B-504: 0.35 (Full Open), 0.21 (18" Open)
- B-505: 0.31 (Full Open), 0.31 (18" Open)
- B-506: 0.40 (Full Open), 0.22 (18" Open)
- B-607: 0.33 (Full Open), 0.19 (18" Open)
- B-608: 0.40 (Full Open), 0.24 (18" Open)
Performance Features:
- Face Velocity: 100 FPM maintained at both full open and 18" sash positions
- Bypass Operation: Automatic adjustment between full open and restricted sash positions
- Air Volume: Constant volume operation with variable face velocity capability
- Collar Configuration: Single or dual collar options based on hood size
- Construction: Robust design for reliable long-term operation
Installation Notes:
- Static pressures listed are for hoods only; additional duct system pressure drop must be calculated
- Total pressure drop through hood and duct system determines proper exhaust blower selection
- Bypass system operates automatically without external controls or adjustments
Why Choose LOC Scientific?
LOC Scientific specializes in bypass fume hood technology that provides continuous protection while optimizing energy efficiency. Our bypass hoods feature automatic operation that eliminates the complexity of manual air volume adjustments while maintaining consistent safety performance.
With decades of experience in laboratory ventilation design, we understand the importance of reliable containment across all operational conditions. Our bypass fume hoods provide the flexibility and safety performance that modern laboratories require for diverse research and analytical applications.
