Silica Bulk Materials

  • Prevent System Over-Pressurization
Upchurch Scientific Pressure Relief Valves are ideal for preventing system over-pressurization. These products protect system components by diverting fluid flow automatically when pressure exceeds the set limit. Choose between our preset 100 psi (7 bar) and 5 psi (0.3 bar) assemblies, both shipped with our Flangeless Fittings. The 100 psi version is a good, general purpose valve, while the 5 psi version is perfect for protecting syringe and peristaltic pump systems. The void volume of both relief valves is low due to the small 0.020" (0.50 mm) thru-holes in the valve tee body.

If you wish to have the Pressure Relief Valve open at a different pressure than 5 or 100 psi, simply combine one of the other replacement Back Pressure Regulator Assemblies with the P-612 Pressure Relief Valve Tee. Choose the P-612S for larger bore tubing and higher flow applications.

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Item #

Item Name


Particle Size

List Price


SILICA PolySULFOETHYL A 5um 300A Bulk Material

Strong Cation Exchange, PolySULFOETHYL A, 5 µm, 300 Å

300 A


SILICA PolyCAT A 5um 1000A Bulk Material

Weak Cation Exchange, PolyCAT A, 5 µm, 1000 Å

1000 A


SILICA PolyHYDROXYETHYL A 5um 100A Bulk Material

Hydrophilic Interaction, PolyHYDROXYETHYL A, 5 µm, 100 Å

100 A


SILICA PolyPROPYL A 5um 300A Bulk Material

Hydrophilic Interaction, PolyPROPYL A, 5 µm, 300 Å

300 A


SILICA C-18 5um 300A

C-18, 5 µm, 300 Å

300 A


SILICA C-18 5um 100A Hydrophilic Endcap

C-18, 5 µm, 100 Å Hydrophilic Endcap

100 A


SILICA C-8 5um 100A

C-8, 5 µm, 100 Å

100 A


SILICA C-18 5um 100A

C-18, 5 &microm, 100 &Aring

100 A


SILICA C-4, 5um 300A

C-4, 5 &microm, 300 &Aring

300 A