BD Series Back Pressure Valves

BD Back Pressure Valves For High Flow Applications

Equilibar’s BD Series back pressure valves with pipe sizes from 1.5″ up through 4″ handle higher flow applications. They use the same precision technology as our small back pressure regulators, but we use terminology “valve” in this case to denote the larger sizes.

The BD Series has external elbows attached to the bottom to save significant space compared with side-ported cylindrical designs. Stainless steel and aluminum valve bodies are welded to commercial pipe elbows, while PVC valves are glued to commercial elbows. Flanges can be optionally welded to the elbows if desired. Aluminum elbows are square in shape while stainless steel and PVC are rounded.

BD valves are used for gases, liquids, and mixed phase applications. For liquid applications, an application engineer will discuss the downstream piping design to make sure that water hammer (resonance) does not cause an issue.


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back pressure valve with manual pilot air regulator
BD-Dimensional-Schematic

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Metal High Flow BD Valve Details – 316 Stainless Steel (SS) standard / Anodized Aluminum (AA) optional

Model Inlet / Outlet Port Reference Port Max Pressure* Valve Takeout (DIM A) Height** (DIM B) Cv Range (Precision) Available End Fittings
psig inch Min Max Std Available
BD-12* 1.5″ 1/8″ 45 (SS);
75 (AA);
120 (BDM)
9.5 (SS); 7.6 (AA) 3.9 (SS); 3.7 (AA) 1.0E-02 14.3 NPT  BSPP;
150# Flange;
300# Flange;
Swagelok VCO®;
swagelok VCR®;
SAE
BD-16* 2″ 70 (SS);
50 (AA);
150 (BDM)
11. (SS); 9. (AA) 4.1 (SS); 4.3 (AA) 3.0E-02 30.2
BD-24* 3″ 1/4″ 45 (SS);
30 (AA);
85 (BDM)
13 (SS); 12.5 (AA) 5.3 (SS); 5.9 (AA) 6.0E-02 60
BD-32 4″ 20 (SS);
20 (AA)
20 8.1 1.5E-01 160
*BD-12,16, and 24 stainless steel valves also come in BDM styles for higher pressure. Contact an application engineer or download the brochure for more details.
**Height is measured from top surface of regulator to the center of pipe elbow. Does not include 3″ manual set point regulator.

Polymer High Flow BD Valve Details – PVC

Model Inlet / Outlet Port Reference Port Max Pressure Valve Takeout (DIM A) Height* (DIM B) Cv Range (Precision) Available End Fittings
psig (inch) Min Max Std Available
BD-12 1.5″ 1/8″ 50 9 4.3 0.1 14.3 NPT BSPP;
150# Flange;
300# Flange;
Swagelok VCO®;
swagelok VCR®;
SAE
BD-16 2″ 30 11 5.1 0.3 30.2
BD-24 3″ 1/4″ 20 15 8.8 0.6 60
BD-32 4″ 20 20 9.6 1.5 160
*Height is measured from top surface of regulator to the center of pipe elbow. Does not include 3″ manual set point regulator.

Other Equilibar Back Pressure Products:

research series back pressure regulator Research Series Back Pressure Regulators 1/16" to 1/4"
up to 10,000 psig / 690 bar(g)
general service back pressure regulator GS series General Service Back Pressure Regulators 1/4" to 1"
up to 2500 psig / 172 bar(g)
industrial service back pressure valve BD seriesIndustrial Service Back Pressure Valves 1.5" to 6"
up to 1000 psig / 69 bar(g)
image of GS back pressure regulator with QPV pilot regulatorElectronic Back Pressure Regulators 1/4" to 4"
up to 5000 psig / 344 bar(g)

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