D70 HEAVY DUTY 2-PIECE INDUSTRIAL DIAPHRAGM SEAL

Two-piece construction – Built to withstand severe process conditions
“Continuous use” seals – Backing plate prevents diaphragm rupture, maintaining pressure until instrument replacement
Serviceable diaphragm – Separable for maintenance with 1/8” NPT or 1/4” NPT flushing connection to remove clogging material
High-quality materials:
- Standard diaphragm: AISI 316L stainless steel (welded for pressures 30 psi and above)
- Optional Viton® diaphragm for vacuum to 100 psi applications
- FKM recommended for applications below 10 psi
Industry compliance:
- ASME B40.100 compliant
- RoHS compliant
- CRN registered (for all 316 SS materials)
5-year warranty for reliability and peace of mind

Ideal for corrosive or viscous process fluids that may:
- Clog instrument internals
- Solidify within pressure gauges, switches, or transmitters

SPECIFICATIONS

Housing	316L SS, Monel^®, Hastelloy^® C
Diaphragm	316L SS, Monel^®, Hastelloy^® C, FKM
Construction	Two piece construction
Gasket Material	Buna N (FKM, PTFE optional)
Connection	Bottom: 1/4”, 1/2”, 3/4” and 1” NPTF Top: 1/4” and 1/2” NPTF
Process Temperature	-22°F to 212°F (-30°C to 100°C)
Other	Flushing connection available. Other materials such as PTFE, PVC, Carbon steel, acetal, Hastelloy^® B, titanium, tantalum, Inconel 825, Inconel 625, Inconel 600, Duplex SS, Super Duplex SS, 316/316L Dual Certified, Monel 400 etc. are available upon request