4500 Series Bellows Sealed Valves
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This miniature valve can be manually or remotely operated. Operating temperatures range from −20° to +250° F [−29° to +120° C], while operating pressures range from high vacuum to 300 psig. Available in brass and Monel®, this valve can be used as a stop valve in a calibrated leak tester, and in labs where leak-tight service is necessary. |
Typical Applications
- Stop valve in calibrated leak tester
- High vacuum work
- Laboratory environments demanding leak-tight service
Features & Benefits
- Protective handle limits escape of process fluid if bellows ruptures
- Bellows assembly is replaced by removing cap handle and retaining nut
- PCTFE seat is fully encapsulated to prevent cold flow
- Bellows is sealed to body with a PCTFE gasket
- Bellows and stem are one-piece assembly
- Available with female NPT or silver-soldered copper tube extensions
- One of the smallest valve types and capacities available
- Air-to-open or air-to-close operators for remote actuation are available
- Valve may be base-mounted
- Special High Tolerance NPT Thread
Technical Data
| Maximum Operating Pressure | 10−5 torr to 300 psig |
|---|---|
| Temperature Range | −20° F to +250° F [−29° C to +120° C] |
| Orifice Size | 0.156 (model 4551Q6M – 0.281 orifice) |
| Cv Factor | 0.70 maximum |
| Internal Volume | 0.08 cubic inches |