Parr Explosion-Proof 3911 Pressure Hydrogenation Apparatus

The Parr Instruments Model 3911 is a compact, shaker-type hydrogenation apparatus designed for safe, reliable laboratory-scale hydrogenation reactions under pressure. Built with explosion-proof components, protective shielding, and a durable shaker mechanism, the 3911 ensures operator safety and experimental precision when working with hydrogen gas. Its robust design and flexible motor and bottle options make it a trusted choice for organic synthesis, catalyst screening, and petrochemical research.

At HiTechTrader, we supply the Parr 3911 hydrogenation system as a refurbished and cost-effective alternative to new equipment. Each unit undergoes rigorous evaluation for performance and safety, ensuring dependable results in demanding laboratory environments.

1. Construction & Features

1. Reaction Bottles: Borosilicate glass (250 mL, 500 mL, 1 L, 2 L) 
1. Pressure-tested and supplied with protective safety shields.
2. Stopper Design: Polypropylene inlet tube minimizes contact between reactants and metal.
3. Hydrogen Reservoir: 4-liter stainless steel tank with precision stainless steel valves and gauges.
4. Valves: Stainless steel stems, PTFE packing, replaceable PCTFE seats.
5. Shaker Mechanism: Operates at ~1725 RPM for efficient gas–liquid mixing.
6. Flexible Motor Options: 
1. Standard motor
2. Air motor
3. Explosion-proof motor (Class 2510, Type MR2H, 1/4 HP, 1725 RPM, 115V/4.2A).

2. Operating Parameters

1. Maximum Working Pressure: 
1. 250 & 500 mL bottles: 60 psig
2. 1 L bottle: 40 psig
3. 2 L bottle: 30 psig
2. Capable of evacuation or hydrogen flushing before reactions.
3. Hydrogen Monitoring: ~8 psi drop per 0.1 mol H₂ consumed (250 mL bottle).
4. Temperature Control: Optional heating mantles and Parr controllers (e.g., Model 4833) with thermocouple integration.

3. Safety & Accessories

1. Protective bottle shields to contain fragments in case of glass breakage.
2. Recommended operation behind safety barricades for hazardous reactions.
3. Explosion-proof motor ensures safe use in volatile lab atmospheres.
4. Optional accessories: heating mantles, controllers, thermocouples, and stainless steel–protected probes.

4. Typical Applications

The Parr 3911 Explosion-Proof Hydrogenation Apparatus is widely used in:

1. Organic Synthesis & Pharmaceuticals – safe hydrogenation reactions.
2. Catalyst Screening – under controlled pressure and agitation.
3. Petrochemical & Fuel Research – hydrogen uptake and batch studies.
4. General Gas–Liquid Reactions – with catalysts, gases, and reactive chemicals.

Why Buy from HiTechTrader?

At HiTechTrader, we specialize in providing refurbished Parr hydrogenation systems like the Model 3911 at significant cost savings compared to new units. Each apparatus is thoroughly inspected for:

1. Mechanical integrity
2. Safety compliance
3. Operational performance

With ready-to-ship inventory, expert technical support, and application-focused guidance, HiTechTrader helps laboratories reduce downtime and accelerate productivity. Choosing HiTechTrader means getting reliable hydrogenation equipment, faster deployment, and long-term confidence in safety and performance.