Virtis Straight Adapter Stainless Steel 3/4 in. OD 3 in. Length Lot of 4 Adapter

VirTis Freeze Dryer Flask Straight Adapter – 3/4 in. OD, 3 in. Length, Heavy-Duty 304 Stainless Steel, Quick-Connect (MPN: 177923)

The VirTis 177923 (manufactured under the SP Scientific product portfolio) is a high-vacuum, instrument-grade straight adapter precision-engineered to connect freeze drying / lyophilization flasks to standard manifold vacuum valves. Measuring exactly 3 inches (76.2 mm) in length with a uniform 3/4 inch (19.1 mm) Outside Diameter (OD), this straight adapter provides a rigid, seamless conduit between the flask cap and the lyophilizer's rubber Quick-Turn/Quick-Seal valves. Machined from premium, non-corrosive 304 stainless steel, it is built to endure the extreme physical forces of deep vacuum pull-downs and intense sub-zero thermal vapor transfers. Its smooth, polished interior prevents vapor restriction, optimizing moisture sublimation out of samples ranging from 150 mL to 2000 mL volumes.

Technical Performance and Design

• Rigid Vacuum-Tight Interface: Designed with a flawless 3/4-inch cylindrical profile that inserts cleanly into rubber multi-port manifold valves. The unyielding stainless steel walls resist deflection or collapse under ultimate system vacuums down to 10 millitorr or below.

• Heavy-Duty 304 Stainless Steel Matrix: Fabricated entirely from surgical-grade, passivated stainless steel. This composition provides maximum resistance against corrosive chemical vapors, organic solvents (such as acetonitrile, DMSO, or TFA), and aggressive cleanroom sterilization agents.

• High-Flow Smooth Core Geometry: Features an optimized inner bore that ensures unrestricted, straight-line vapor travel. This design minimizes ice condensation friction inside the adapter tube, helping to accelerate sublimation rates and shorten operational freeze drying cycles.

• Universal Flask Cap Seating: Engineered to slide directly into standard VirTis Wide Mouth and Fast-Freeze lyophilizing flask tops, utilizing an O-ring compression layout to secure a hermetic seal without requiring stopcock grease.

Product Specifications

• Catalog Number / MPN: 177923

• Manufacturer / Brand: VirTis / SP Industries (SP Scientific)

• Adapter Geometry Profile: Straight Tube Connector / Splice

• Physical Tube Length: 3.00 inches (76.2 mm)

• Outside Diameter (OD): 3/4 inch (19.1 mm) Uniform Shaft

• Material Composition: Industrial-Grade 304 Stainless Steel (SS)

• Flask Volume Compatibility: Supports standard 150 mL, 300 mL, 600 mL, 1200 mL, and 2000 mL lyophilizing flask structures

• Sterility / Process State: Non-Sterile Core Hardware (Fully Autoclavable and solvent-wash safe)

Key Benefits and Applications

• Lyophilizer Manifold Connection: The standard mechanical link required to interface large or small biological samples contained within glass freeze-drying flasks to multi-port horizontal or drum manifolds.

• Organic Solvent Sublimation: Preferred over traditional glass or plastic adapters when processing volatile organic chemical mixtures because metal cannot shatter, etch, or undergo plasticizer stress-cracking.

• Simplified Cleanroom Autoclaving: Withstands continuous steam autoclave sterilization loops up to 134°C, allowing laboratory staff to easily purge biological cross-contamination trace proteins between batches.

• Resilience to Operational Thermal Shock: Safely cycles between cryogenic pre-freezing states (-80°C to -105°C) and room temperature vapor loads without compromising structural dimensions or vacuum seals.

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