FLUSH PANCAKE (WAFER) DIAPRHAGM SEAL

The Flush Pancake (Wafer) Diaphragm Seal is a flange type diaphragm seal with no bolt holes. It mounts between an open process flange and cover flange. Instruments are connected via side capillary connection and it is an ideal seal for transmitters or dP transmitters.

Multi-piece Seal Design Bolts Directly to Process Flange
Commonly Supplied with Flush/Calibration Ring
Ideal for Gauge or Differential Pressure Transmitters
Allows for Different Classes of Flanges to be Interchanged Given the Same Flange Size
Backing Flange Provided with 3/8″ Mounting Bolt as Standard
Schneider Electric (Foxboro) Mounting Holes Also Included

Specifications

Optional Non-Wetted Materials

Flange: 316 SS or Others

Wetted Materials

Insert/Diaphragm: Hast 276, Tantalum, Monel, or Others

Process Temperature Limits

-150° to 850°F

Ambient Temperature Limits

Determined by the Pressure Instrument.

Minimum Recommended Pressure Ranges

	Diaphragm Size
	2.2″	3.5″	4.1
2.5” & 3.5” Gauges	15 psi	10 psi	30 “H₂0
4”, 4.5”, & 6” Gauges	30 psi	10 psi	30 “H₂0
Transmitter (Gauge Pressure)	150 “H₂0	30 “H₂0	15 “H₂0
Transmitter (Differential Pressure)	100 “H₂0	30 “H₂0	15 “H₂0
Differential Pressure Gauge	N/A	N/A	100 “H₂0

Available Diaphragm Sizes

	Diaphragm Size
	2.2″	3.5″	4.1
2″ Flange	STD	N/A	N/A
3″ Flange	-D5	STD	N/A
4″ Flange	-D5	-D9	STD

Weights and Dimensions

	Flange Rating	A	B	Weight (lbs.)
2″	150# – 2500#	3.62″	1.25″	4
3″		5″	1.25″	7
4″		6.19″	1.25″	11

Maximum Working Pressures at 100ºF: Determined by ANSI B16.5 flange ratings. NOTE: Weights and dimensions is for raised face flange only. Other flange sizes and sealing face info can be found in ANSI B16.5 standards.

Flush Pancake (Wafer) Diaphragm Seal (W9FP)