How do Vacuum Manifolds work?
A vacuum manifold is a tube or block with one inlet for the pump and several valved outlets. Opening a valve connects that outlet to the vacuum while the others remain closed, so each station can be isolated without disturbing the rest. The manifold body must have enough internal bore that flow is not restricted, and each valve must seal reliably at the working vacuum. A gauge or regulator may be fitted to set and monitor the level. Manifolds are made from stainless steel, PTFE, polypropylene or glass depending on chemical exposure and temperature, and connections are usually hose barbs, luer fittings or flanges. Versions with a purge or vent port allow controlled release of vacuum. Because all ports share one pump, the pump flow must be sufficient for the number of stations in use at once.
Which Vacuum Manifolds variants are available?
- Vacuum Filtration Manifold — A vacuum filtration manifold holds several filtration funnels over a common receiver and shares one vacuum source.
- Solid-Phase Extraction Manifold — A solid-phase extraction manifold holds multiple SPE cartridges or plates and applies vacuum for controlled flow.
- Schlenk Line Vacuum Manifold — A Schlenk line vacuum manifold combines a vacuum tube and an inert gas tube with multiple stopcocks.
- Multi-Port Vacuum Distribution Manifold — A multi-port vacuum distribution manifold routes one pump to many instruments or vessels with independent valves.
- Stainless Steel Vacuum Gas Manifold — A stainless steel vacuum and gas manifold switches between vacuum and gas for several vessels under pressure or vacuum.
- Modular Vacuum Manifold — A modular vacuum manifold is built from interchangeable tubes, tees and valved modules, so its port count and layout can be changed as needs evolve.
How do I choose the right variant?
Choose the number of ports from the maximum number of stations you will run at once, and check the internal bore so the last port still receives adequate vacuum. Select the body and valve materials for your solvents: PTFE and polypropylene for aggressive chemistry, stainless steel for durability and higher temperatures, and glass for visibility and inertness. Decide which connection type suits your flasks, cartridges or reactors, and whether each port needs an individual control valve or a simple on-off stopcock. Add a gauge or a regulator if the vacuum level must be set, and a vent or purge port if you need to release vacuum gradually. Confirm the pump flow rating for the total number of ports, and consider a manifold with a removable tray or rack for holding vessels.
Where are Vacuum Manifolds used?
Vacuum Manifolds are specified in multi-place vacuum filtration, solid-phase extraction, schlenk line vacuum and gas, parallel reaction workup, vacuum drying of multiple samples and sample concentration manifolds.
Which standards and certifications apply?
Work with Vacuum Manifolds is commonly governed by IEC 61010-1, ISO 21360, ISO 9001, USP <711> and GB 4793.1. Instrument certifications such as CE marking are confirmed per configuration and never assumed.
What are the key considerations before purchase?
Check every valve for leaks at the working vacuum, because a single leaking port reduces performance at all stations. Use the correct tubing and clamps, and avoid kinking or long runs that reduce conductance. Keep manifolds clean and dry, and do not use vacuum grease where it can contaminate samples or block fine passages. Do not exceed the rated vacuum if the body is glass, and support glassware to avoid stress. For solvent work, trap vapor before it reaches the pump and route exhaust safely. Follow IEC 61010-1 for associated electrical equipment. Record the vacuum achieved at each port during commissioning, so that a blocked valve or leaking connection is noticed early.
