Diaphragm sealed gauge commonly known as "chemical seal" gauge are designed and recommended to isolate the measuring system of a pressure gauge from corrosive, pasty or dangerous fluid depending on the viceosity, pressure, temperature, solidification of a particular process medium.

The diaphragm seal has been filled under vacuum with the transmitting liquid, the pressure gauge/diaphragm seal assembly must never be dismantled.

A carefully designed corrogated diaphragm is used to achieve maximum flexibility and linearity with sufficient stroke to provide the displacement needed to produce full deflection of the sensing element.

The diaphragm is argon arc welded to the top chamber to ensure a perfect selling "No LEAK". In some cases the diaphragm is coated OR lined with a second membrane (teflon). The welded construction facilitates removal of the gauge for repair/service without process shut down.

The displacement of the diaphragm is transmitted to the bourdon sensing element, through solidly filled liquid having low cubical expansion with greater temperature stability.

The gauge indicator is either directly fitted with the sealed chamber OR by means of capillary tube, thus permitting easier mounting OR the remote reading of the pressure.

TECHNICAL SPECIFICATIONS :
TYPE	DIAGHRAM SEALED	STANDARD FITMENT	Blow out disc
ACCURACY	+/- 1% of range span
DIAL SIZE	100 & 150 mm	STANDARD RANGES	Pressure : 0 –1,1.6,2,2.5,4,6,10,16,25, 40,60,100,160,250,400 & 600 kg/cm2
WINDOW	Clear glass-standard shatter proof glass-optional		Vacuum: 0 to 760 mm Hg Vac Compound: (-)1 to (+)3, 5, 9, 15 & 24 kg/cm2
BOURDON TUBE MATERIAL	AISI 316 ss
MOVEMENT MATERIAL	AISI 316 SS	SEALED UNIT CONSTRUCTION	Diaphragm welded with SS chamber
SHANK MATERIAL	AISI 316 SS		Diaphragm Loosely placed in between Top & Bottom chamber
ENCLOSURE	Die cast aluminium weather proof Stove enamelled black-Standard Pressed AISI 304 ss-Optional	SENSING ELEMENT DIAPHRAGM MATERIAL	Diaphragm AISI 316 ss
ENCLOSURE TYPE	IP65
MOUNTING	Local (Direct) Local (Surface/Wall Projection) Flush Panel (remote sensing)	SEALING LIQUID TOP CHAMBER	Silicone oil AISI 304 SS
CONNECTION LOCATION	Bottom for direct & surface / Wall / Projection mounting Back for flush panel mounting	BOTTOM CHAMBER & CONNECTION MATERIAL	AISI 316 SS
		CONNECTION	½ BSP (M) ½" NPT (M) M20 x 1.5mm (M) – Standard
CAPILLARY PROTECTION	Spiral / Sheath		Flanged as per BS, ASA & DIN
LENGTH OF CAPILLARY	Standard-2 Metres Available upto 10 Metres
CAPILLARY MATERIAL	AISI 316 ss
CAPILLARY PROTECTION MATERIAL	AISI 304 ss
Diaphgram operated chemical sealed pressure gauge bottom entry Diaphgram operated chemical sealed pressure gauge back entry

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