Non Return Valves
Our non-return valves protect tubing and vacuum systems from backflow when pressure falls in the system. Sealing system eliminates backflow, helping to prevent upstream contamination or damage. These valves are compatible with a wide range of systems, all with different specific levels when dealing with the three main pressure values: cracking pressure, maximum pressure, and back pressure created. Durable steel or plastics are used in all designs, creating a quality product that will remain independent for years with no need for replacement.
VWR® Non-Return Valves
Supplier: VWR International
This polypropylene non-return valve protects tubing and vacuum systems from back flow when pressure falls in the system.
Expand 1 Items
Two-Way Tubing Connector Valve, Ace Glass Incorporated
Supplier: Ace Glass
Similar to the Variable Bore Tubing Connector (89077-438), except this Two-Way Tubing Connector Valve features a single Tefzel control valve rated at 500psi
Expand 1 Items
Eight-Way Tubing Connector Valve, Ace Glass Incorporated
Supplier: Ace Glass
This eight-way tubing connector valve is used for applications where multiple channels are necessary for distributing reagents, solvents, or buffers to chromatography columns
Expand 1 Items
Connectors, with PTFE Plug Valve, Ace Glass Incorporated
Supplier: Ace Glass
Polypropylene connectors, two-way or three-way, with PTFE valve and serrated tubulations
Expand 4 Items
Three-Way Tubing Connector Valve, Ace Glass Incorporated
Supplier: Ace Glass
This three-way tubing connector valve is used for applications where stream switching, reagent switching, sample removal, or sample injection is desirable
Expand 1 Items
PTFE Stopcock Valve, Two Way, Ace Glass Incorporated
Supplier: Ace Glass
This PTFE valve is used with NPT fittings.
Expand 10 Items
Shut-Off Valves, Upchurch Scientific®
Supplier: Upchurch Scientific
Stop a flow stream quickly with these shut-off valves. The bodies are manufactured from either PEEK or ETFE and both versions feature a PCTFE rotor, making them highly resistant to chemicals. The blue colorant used in some valve configurations has proven not to leach out with common HPLC solvents.
Expand 1 Items
Ball Valve, Parker Balston® Shut-Off Gas Valve, Restek
Supplier: Restek
Parker's fittings are ideal for installing new equipment, modifying existing instrumentation, or replacing worn connections.
Expand 1 Items
PerformancePLUS Check Valve Housing for Waters HPLC Systems, Restek
Supplier: Restek
PerformancePLUS Check Valve Housing, for HPLC Systems, Model No: 1515, 1525, 510, 515, 525, 600, 610
Expand 1 Items
Inlet Check Valve for PerkinElmer HPLC Systems, Restek
Supplier: Restek
Inlet Check Valve for HPLC Systems, Model Number: Int. 4000, 1, 10, 2, 200 Series, 250, 3, 3B, 4, 400, 410, 620, Series 200 Micropump
Expand 1 Items
OPTI-MAX® Replacement Check Valves
Supplier: Optimize
Each ball and seat set is individually matched to ensure a lock-and-key fit. This guarantees three bubbles/minute or less in the industry standard nitrogen bubble test; common acceptable standards are 12 bubbles or less. We have also minimized the ball travel distance within the check valve; less travel distance equals quicker seating and more accurate pump metering. Simply put, tighter specifications make a better valve.
Expand 13 Items
PerformancePLUS Check Valve Cartridge for Waters HPLC Systems, Restek
Supplier: Restek
PerformancePLUS Check Valve Cartridge, for HPLC Systems, Model Number: 1515, 1525, 2690, 2695, 2795, 510, 515, 600, 610