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DBA – DBB manifold with Normally Closed Atmospheric Reference Valve
The DBA Series diaphragm valve is a modular, stream-switching, manifold assembly containing double-block-and-bleed valves and a fast loop shut-off with an atmospheric reference. The DBA Series consists of DBB Series valves stacked with a single DSV Series valve. All valves are totally free of springs, bellows, packing and lubricants in the process wetted area. Metal-to-metal seals to atmosphere ensure that there is no transport of undesirable elements into the flow stream. Elgiloy® diaphragms ensure the utmost in corrosion resistance and extended overall life span.
- Stream select manifold assembly
- Surface mount ANSI/ISA-76 compliant*
- Metal-to-metal seals to atmosphere to prevent leakage
- Wide choice of materials for virtually all applications
- Replaceable seats for extended service life
- No dynamic o-rings, springs or lubricant in wetted flow path to eliminate sample contamination
- Stacked diaphragms for extended service life
- Integrated sweep loop in manifold
- Pneumatic actuation (DSV valve is top air only)
- Pressures from vacuum (50 torr) to 500 psig (34 barg)
- Compact package (3˝ L × 2.6˝ H × 1.5″ W)
* CT76 Base adapter plate required for non-CT76 manufactured surface mount systems-consult factory
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| Body | 316L Stainless Steel, Monel® and Hastelloy® C-276 |
| Seats | PCTFE and PEEK™ |
| Diaphragms | Elgiloy®AMS 5876 |
| Orifice Size | 0.110˝ (2.8 mm) |
| Flow Capacity | 0.13 Cv |
| Valve Internal Volume* | 0.64 cc |
| Leakage | 1×10-5 cc/sec helium (inboard) |
| MIN ACTUATION PRESSURE | 50 psig @ 50 psig process) |
Operating Temperatures
| Seat Material | ¼-PLUS TURN TEMPERATURE |
| PCTFE | -40° F to +212° F -40° C to +100° C |
| PEEK™ | 0° F to +400° F /-18° C to +204° C |
Operating Pressures
| Operating Pressure* | Vacuum (50 torr) to 500 psi (34 bar) |
| Proof Pressure | 2000 psig (138 barg) |
| Burst Pressure | 8000 psig (552 barg) |
Support Materials
Flow Formulas