Marsh Bellofram - Marsh Division - Diaphragm Seals - Marsh Bellofram - #1

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50 Diaphragm Seals MODEL 12000 MINI SERVICEABLE RUBBER DIAPHRAGM SEAL The Model 12000 Serviceable Mini Diaphragm Seal is designed for gauges and instruments with operating pressures of 2500 psi with stainless and 500 psi with PVC models. Ideally suited for small applications and corrosive installations. The optional ‘Easy Clean Out’ feature allows the removal of the process side housing without losing the instrument side fill fluid. Fill / bleed screw port in the instrument side housing, and stainless steel build screws are standard. FILLED & CALIBRATED TO GAUGES ONLY. ASSEMBLY 14" 22 DIAPHRAGM Nitrile 3 Fluorocarbon 4 Neoprene 5 FILL No Fill 0 Glycerine G Silicone S Syltherm Y B8498 12000 Diaphragm seals are isolation devices which separate pressure gauges and other instruments from the process media while allowing the instrument to measure the process pressure. The service life of the instrument is greatly extended, because it is protected from corrosion, clogging, freezing, or pulsation. LIQUID FILLINGS The selection of the fill depends on the temperature expected in any given application. Temperature ratings for available fillings are listed below. Glycerine 0 to 400ºF Silicone –40 to 600ºF Syltherm –40 to 750ºF DIAPHRAGM Nitrile 3 Fluorocarbon 4 Neoprene 5 EASY CLEAN OUT None 0 Clean Out 2 LOWER 316SS 14" 22 12" 24 PVC 14" 52 12" 54 FILL No Fill 0 Glycerine G Silicone S Syltherm Y UPPER 316SS 14" 22 12" 24 PVC 14" 52 12" 54 MODEL B8498 GAUGE PROTECTOR WITH RUBBER DIAPHRAGM SEAL The Model B8498 Gauge Protector is designed for extremely high volume displacement. Ideally suited for gauges and instruments with operating pressures up to 200 psi and vacuum applications. Available in 14" threaded connections and chrome plated zinc construction. A 38" flush plug is standard in the process side housing. FILLED & CALIBRATED TO GAUGES ONLY.