Diaphragm Seal

Diaphragm Seal 510 - 511

This compact isolator is small enough in design to be used in confined spaces, but provides sufficient displacement to drive a wide variety of instrumentation.

Its all-welded tamperproof design prevents possible process media leakage.

Features Include:

Compact size
Light weight
All-welded design
1,500 psi rating standard, 5,000 psi rating optional
Continuous duty design
Minimized fill volume

Male connections eliminate adapters/fittings.

Diaphragm Seals 100

The top housing and diaphragm capsule are interchangeable with all Ashcroft bottom housings.
A fill/bleed connection is standard, which permits filling the seal and instrument simultaneously after evacuation and allows the fill to flow into the completed unit.
An O-ring, compatible with all standard fill fluids, and a Teflon back-up ring provide a seal between the diaphragm capsule and the top housing.
The diaphragm is Teflon coated to provide an integral gasket, thus assuring a leak-tight connection between the diaphragm and the bottom housing.
Top housing and pressure instrument are removable.
Continuous-duty design will prevent loss of process fluid if pressure instrument is removed or fails.

The comprehensive line of Ashcroft diaphragm seals will meet a wide variety of application or installation requirements. Over 30,000 variations are possible with the s, connections and materials available.

Midi-Diaphragm Seal 311

All welded metal construction, prevents leakage of process media
No gaskets or bolts
For use on pressure gauges up to 3.5″ from 60 to 1,000 psi and 4.5″ gauges 100 psi to 1,000 psi
Top housing material 316L Stainless Steel standard
Diaphragm materials in 316L Stainless Steel, Hastelloy C and Tantalum
Bottom housing materials in 316L Stainless steel and Hastelloy C
25 NPT or 0.50 NPT instrument connections
Type 312 furnished with 0.25 flushing connection

Type 312 not available in male process connections

Diaphragm Seal 300

Broad selection of materials for meeting various service applications, including Teflon, Viton and Kalrez diaphragms.
Elastomeric diaphragm is clamped securely between the top and bottom housings by clamp rings, assuring positive seal.
Top housing is contoured to match diaphragm, minimizing distortion of the diaphragm should the pressure instrument be removed.
Continuous duty.
Fill/bleed connection is standard.
Top housing and diaphragm are nonremovable.

Teflon, Viton and Kalrez diaphragms available in threaded and flanged inlet connections.