BACK PRESSURE REGULATORS (BPRs) BPR · PDF fileOur line of back pressure regulators includes: • 5 and 20 psi Assemblies • 40, 75, 100, ... Within this range, the amount of back

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Fx: 800.359.3460 / 360.679.3830 • Email: [email protected] • UPCHURCH SCIENTIFIC®

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If you prefer flow-dependent back pressure, try our Micro-Metering Valves found on page 87.

BACK PRESSURE REGULATORS (BPRs) Proven Outgassing Protection Provide Flow-Independent Pump Preload for GreaterPump Efficiency

5 to 1,000 psi Cartridges and Assemblies Available

Upchurch Scientific® offers a full line of factory preset back pressure regulators, designed to enhance system performance through outgassing prevention and improved pump check valve efficiency.

Small gas bubbles often form as solvent moves from the high pressure environment of an HPLC column to the low pressure environment leading to the detector. This outgassing can cause erratic baseline readings and loss of sensitivity. Placing an Upchurch Scientific BPR after the detector provides an excellent, low-cost method for preventing this problem by maintaining enough back pressure on the mobile phase to keep gases dissolved in solution.

A back pressure regulator can also be used as a pump preload for low and fluctuating pressure applications. Many of today’s pumps require a steady back pressure to function properly. Install an Upchurch Scientific BPR (usually 500 – 1,000 psi) between the pump and the injector to enhance pump performance. Caution: Do not exceed the maximum operating pressure of your system — please refer to the operating manuals for your system components before choosing the appropriate BPR.

Our line of back pressure regulators includes:

• 5 and 20 psi Assemblies

• 40, 75, 100, 250, 500 and 1,000 psi Cartridges and Assemblies; 750 psi BPR available only as a Cartridge

• PEEK™ and Stainless Steel BPR Holders

• High Pressure Adjustable BPR for pressures between 2,000 and 5,000 psi

BPR ASSEMBLIESChoose from our line of PEEK and Stainless Steel BPR Assemblies, each complete with a replaceable, factory preset cartridge.

Our BPR Assemblies are available in back pressures ranging from 5 to 1,000 psi (0.3 to 69 bar). For low pressure applications, we recommend our 5 and 20 psi PEEK BPR Assemblies. These products are ideal for eliminating back pressure fluctuation in systems that have delicate components requiring a low pressure threshold. Since these two preset assemblies are extremely sensitive, they are sold as assemblies only – replacement cartridges are not sold separately.

Flangeless Ferrule

Cartridge Holder

Cartridge

Color-Coded End Cap

Flangeless Nut

Each BPR Assembly includes a presetBPR Cartridge and Upchurch Scientific fittings for 1/16” OD tubing.

PEEK Back Pressure Regulator Assembly, shown with available Cartridges

U•609500 psi BPRshown with P•765 Cartridge

1.90”

.43”

1.04”

P•7905 psi BPR(sold as assembly only)

1.92”

.42”

BACK PRESSURE REGULATOR ASSEMBLY

Back Pressure Regulators

UPCHURCH SCIENTIFIC® • Ph: 800.426.0191 / 360.679.2528 • www.upchurch.com

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Pressure Rating 5,000 psi (345 bar)* Pressure Rating 6,000 psi (414 bar)**

P•76140 psi BPR Cartridge

P•7961,000 psi BPR Cartridge

REPLACEMENT BPR CARTRIDGESUpchurch Scientific® BPR Cartridges have a maximum internal volume of 146µL. These cartridges are manufactured from inert PEEK™ and Tefzel® (ETFE) polymers. Internal components are manufactured from PEEK, highly fluorinated elastomer and gold-plated stainless steel. The replacement cartridges will operate in any of the holders listed on this page. These cartridges offer pressure ratings from 40 to 1,000 psi (2.8 to 69 bar) — all independent of flow except as noted below.

Please Note: The recommended operating flow rate range for our BPR Cartridges is 0.1mL - 10mL/min. Within this range, the amount of back pressure created by the BPR Cartridges and Assemblies will not vary more than ±10%. Lower or higher flow may result in larger pressure fluctuations.

BACK PRESSURE REGULATOR ASSEMBLIES WITH PEEK HOLDER

Swept VolumeP•790 5 psi (0.3 bar) BPR cartridge with PEEK holder1 134µL $ 70.40P•791 20 psi (1.4 bar) BPR cartridge with PEEK holder1 134µL 70.40P•785 40 psi (2.8 bar) BPR cartridge (P•761) with PEEK holder2 131µL 70.40P•786 75 psi (5.2 bar) BPR cartridge (P•762) with PEEK holder2 131µL 70.40P•787 100 psi (7 bar) BPR cartridge (P•763) with PEEK holder2 131µL 70.40P•788 250 psi (17 bar) BPR cartridge (P•764) with PEEK holder3 102µL 70.40P•789 500 psi (34 bar) BPR cartridge (P•765) with PEEK holder4 96µL 70.40P•455 1,000 psi (69 bar) BPR cartridge (P•796) with PEEK holder4 89µL 70.40

BACK PRESSURE REGULATOR ASSEMBLIES WITH STAINLESS STEEL (S.S.) HOLDER

Swept VolumeU•605 40 psi (2.8 bar) BPR cartridge (P•761) with S.S. holder5 129µL $ 92.80U•606 75 psi (5.2 bar) BPR cartridge (P•762) with S.S. holder5 129µL 92.80U•607 100 psi (7 bar) BPR cartridge (P•763) with S.S. holder5 129µL 92.80U•608 250 psi (17 bar) BPR cartridge (P•764) with S.S. holder5 99µL 92.80U•609 500 psi (34 bar) BPR cartridge (P•765) with S.S. holder5 93µL 92.80

REPLACEMENT CARTRIDGES

COLOR CODING Swept BODY END-CAP VolumeP•761 40 psi (2.8 bar) BPR cartridge Tan Blue 125µL $ 48.45P•762 75 psi (5.2 bar) BPR cartridge Tan Yellow 125µL 48.45P•763 100 psi (7 bar) BPR cartridge Tan Red 125µL 48.45P•764 250 psi (17 bar) BPR cartridge Tan White 95µL 48.45P•765 500 psi (34 bar) BPR cartridge Tan Green 89µL 48.45P•795 750 psi (52 bar) BPR cartridge Black Blue 87µL 48.45P•796 1,000 psi (69 bar) BPR cartridge Black Green 83µL 48.45

BACK PRESSURE REGULATOR HOLDERS

P•465 Biocompatible PEEK BPR holder4 $ 47.50U•469 High Pressure Stainless Steel BPR holder6 67.30

HIGH PRESSURE ADJUSTABLE BACK PRESSURE REGULATOR ASSEMBLY

Swept VolumeP•880 2,000 - 5,000 psi (138-345 bar) Adjustable BPR7 9µL $ 110.00

1 Comes complete with P•200 ETFE Flangeless Ferrules and P•215 ETFE Flangeless Nuts.2 Comes complete with P•200 ETFE Flangeless Ferrules, P•215 ETFE Flangeless Nuts and wrenches.3 Comes complete with P•200 ETFE Flangeless Ferrules, P•235 PEEK Flangeless Nuts and wrenches.4 Comes with LT•115 LiteTouch PEEK Nuts, P•250 Super Flangeless Ferrules and wrenches.5 Comes complete with P•200 ETFE Flangeless Ferrules and P•201 Delrin® Flangeless Nuts.6 Comes with F•300 PEEK Two-Piece Fingertight Fittings.7 Comes with F•120BLK One-Piece Fingertight Fittings.

BPR HOLDERSOur P•465 PEEK and U•469 Stainless Steel BPR Holders work with any of our replacement BPR cartridges. Each holder comes complete with Upchurch Scientific fittings for 1/16” OD tubing (see below). The U•469 Holder is surface-treated to prevent galling, a potential problem with large, threaded metal parts.

Please Note: These PEEK Back Pressure Regulator Holders are designed to allow each cartridge to operate at its stated pressure setting when tightened to 20 in. lbs. of torque. To approximate this level of torque, first finger tighten the Holder, then tighten an additional 1/4 turn with the supplied wrenches.

P•465PEEK BPR Holder(cartridge sold separately)

U•469Stainless Steel BPR Holder(cartridge sold separately)

F•300Two-Piece Fingertight Fitting(page 11)

LT•115LiteTouch® Nut(page 16)

P•250Super Flangeless™ Ferrule(page 16)

HIGH PRESSURE ADJUSTABLE BPRThe P•880 High Pressure Adjustable BPR offers the flexibility to adjust your system back pressure between 2,000 and 5,000 psi (138 and 345 bar), independent of the flow‡. Simply turn the thumbscrew, while monitoring your system pressure, to achieve the desired back pressure setting. Because this product creates such high back pressure, please check system component specifications prior to using this high pressure regulator to avoid damaging any sensitive components.‡ Only 10% fluctuation in pressure generally occurs with flow rates of 0.1 - 10mL/min. Lower or higher flow rates will lead

to greater fluctuations in pressure.

BPR HOLDERS

* Using PEEK tubing and supplied fittings.

P•880High Pressure Adjustable BPRIncludes One-Piece Fingertight Fittingsfor 1/16” OD tubing

.73”

1.08”

Back Pressure Regulators

** Using stainless steel tubing and supplied fittings.