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EJA438E

Yokogawa EJA438E gauge pressure transmitter is a single remote diaphragm seal type for high temperature process gauge pressure measurement.
Brand: Yokogawa
Place of origin: Japan/Dubai of UAE
Delivery: 6 to 8 weeks

EJA438E GS

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1. General Introduction

EJA438E Diaphragm Sealed Gauge Pressure Transmitters can be used to measure gauge pressure of liquid, gas, or steam, especially for high temperature process which up to 310°C, standard flange connection with 112/", 2", 3" and 4", flush and extend type flange selectable with pressure rating up to 600lbs; standard capillary up to 10 meters.

2. Measuring Span & Range limits

Measurement Span/Range			MPa	inH2O (/D1)	mbar (/D3)	mmH2O (/D4)
A		Span	0.06 to 3.5	8.6 to 500	0.6 to 35	0.6 to 35
		Range	-0.1 to 3.5	-14.5 to 500	-1 to 35	-1 to 35
B	Flush type	Span	0.46 to 16	67 to 2300	4.6 to 160	4.6 to 160
	Flush type	Range	-0.1 to 16	-14.5 to 2300	-1 to 160	-1 to 160
	Extended type	Span	0.46 to 7	67 to 1000	4.6 to 70	4.6 to 70
	Extended type	Range	-0.1 to 7	-14.5 to 1000	-1 to 70	-1 to 70

3. Process temperature, Ambient temperature, and Working pressure

Liquid Fill

Code

Process temperature*

Ambient temperature*

Working pressure

Silicone oil

(general use)

–10 to 250°C

(14 to 482°F)

–10 to 60°C

(14 to 140°F)

2.7 kPa abs

(0.38 psi abs)

to flange rating pressure

Silicone oil

(general use)

–30 to 180°C

(–22 to 356°F)

–15 to 60°C

(5 to 140°F)

Silicone oil

(high temperature use)

10 to 310°C

(50 to 590°F)

10 to 60°C

(50 to 140°F)

Fluorinated oil

(oil-prohibited use)

–20 to 120°C

(–4 to 248°F)

–10 to 60°C

(14 to 140°F)

51 kPa abs

(7.4 psi abs)

to flange rating pressure

Ethylene glycol

(low temperature use)

–50 to 100°C

(–58 to 212°F)

–40 to 60°C

(–40 to 140°F)

100 kPa abs

(atmospheric pressure)

to flange pressure rating

Silicone oil

(high temp. and high

vacuum use)

–10 to 250°C

(14 to 482°F)

–10 to 60°C *

(14 to 140°F)

0.013 kPa abs

(0.0019 psi abs)

to flange rating pressure

Silicone oil

(high temp. and high

vacuum use)

10 to 310°C

(50 to 590°F)

10 to 60°C

(50 to 140°F)

Silicone oil

(high vacuum use)

–10 to 100°C

(14 to 212°F)

–10 to 60°C

(14 to 140°F)

4. Flange size and rating

Process connection style

Size

Flange

Flush type

3-inch,

2-inch,

11/2-inch

JIS 10K, 20K, 40K, 63K

ANSI Class 150, 300, 600

JPI Class 150, 300, 600

DIN PN10/16, 25/40, 64

Extended type

4-inch, 3-inch

JIS 10K, 20K, 40K

ANSI Class 150, 300

JPI Class 150, 300

DIN PN10/16, 25/40

5. Model and suffix codes

5.1 Transmitter body selection

Main Code	Suffix Codes										Description
EJA438E											Diaphragm gauge pressure transmitter
Output signal	-D										4 to 20 mA DC with digital communication (BRAIN protocol)
	-J										4 to 20 mA DC with digital communication (HART 5/HART 7 protocol)
	-F										Digital communication (FOUNDATION Fieldbus protocol)
	-G										Digital communication (PROFIBUS PA protocol)
	-Q										Low Power, 1 to 5 V DC with digital communication (HART 7 protocol)
Measurement span (capsule)		A									0.06 to 3.5MPa (8.6 to 500 psi)
Measurement span (capsule)		B									0.46 to 16MPa (67 to 2300 psi)
—			S								Always S
—				C							Always C
Cover flange bolts and nuts material					J						B7 carbon steel
					G						316L SST
					C						660 SST
Installation						-9					Horizontal piping and left side high pressure
Amplifier housing							1				Cast aluminum alloy
							3				Cast aluminum alloy with corrosion resistance properties
							2				ASTM CF-8M stainless steel
Electrical connection								0			G1/2 female, one electrical connection without blind plugs
								2			1/2 NPT female, two electrical connections without blind plugs
								4			M20 female, two electrical connections without blind plugs
								5			G1/2 female, two electrical connections and a blind plug
								7			1/2 NPT female, two electrical connections and a blind plug
								9			M20 female, two electrical connections and a blind plug
								A			G1/2 female, two electrical connections and a SUS316 blind plug
								C			1/2 NPT female, two electrical connections and a SUS316 blind plug
								D			M20 female, two electrical connections and a SUS316 blind plug
Integral indicator									D		Digital indicator
									E		Digital indicator with the range setting switch (push button)
									N		None
Mounting bracket										B	304 SST 2-inch pipe mounting, flat type (for horizontal piping)
										J	316 SST 2-inch pipe mounting, flat type (for horizontal piping)
										N	None
Optional codes											/Optional codes

5.2 Diaphragm seal selection 3-inch(80mm)/2-inch(50mm) flush type

Main Code

Suffix Codes

Description

EJA438E

Transmitter body section (I)

Process connection style

-W

Flush type

Flange rating

JIS 10K

JIS 20K

JIS 40K

JIS 63K

ANSI class 150

ANSI class 300

ANSI class 600

DIN PN10/16

DIN PN25/40

DIN PN64

JPI class 150

JPI class 300

JPI class 600

Process connection size (Process flange size)

3-inch (80 mm)

2-inch (50 mm)

Flange material

JIS S25C

304 SST

316 SST

Gasket contact surface

Serration (for ANSI flange with wetted parts material SW only)

Flat (no serration)

Wetted parts material

316L SST Diaphragm, 316L SST Others

Hastelloy C-276 Diaphragm, Hastelloy C-276 Others

Tantalum Diaphragm, Tantalum Others

Titanium Diaphragm, Titanium Others

Flushing connection ring

None

Straight type ring, R1/4 connections, 316 SST

Straight type ring, 1/4NPT connections, 316 SST

Extension

None

Fill fluid

-A

For general (silicone oil), Process–10 to 250°C, Ambient–10 to 60°C

-B

For general (silicone oil), Process–30 to 180°C, Ambient–15 to 60°C

-C

For high temperature (silicone oil), Process 10 to 310°C, Ambient10 to 60°C

-D

For oil-prohibited (fluorinated oil), Process-20 to 120°C, Ambient-10 to 60°C

-E

For low temperature (ethylene glycol), Process-50 to 100°C, Ambient-40 to 60°C

-1

For high temp. & vacuum (silicone oil), Process-10 to 250°C, Ambient-10 to 60°C

-2

For high temp. & vacuum (silicone oil), Process10 to 310°C, Ambient10 to 60°C

-4

For high vacuum (silicone oil), Process-10 to 100°C, Ambient-10 to 60°C

Capillary connection

Side of diaphragm seal unit

—

Always 2

Capillary length*

10m

Optional codes

/Optional codes

5.3 Diaphragm seal selection 1-1/2inch(40mm) flush type

Main Code

Suffix Codes

Description

EJA438E

Transmitter body section (I)

Process connection style

-W

Flush type

Flange rating

JIS 10K

JIS 20K

JIS 40K

ANSI class 150

ANSI class 300

ANSI class 600

JPI class 150

JPI class 300

JPI class 600

Process connection size

(Process flange size)

1-1/2-inch (40 mm)

Flange material

JIS S25C

304 SST

316 SST

Gasket contact surface

Serration (for ANSI flange with wetted parts material SW only)

Flat (no serration)

Wetted parts material

316L SST Diaphragm, 316L SST Others

Flushing connection ring

Reducer type ring, R1/4 connections, 316 SST

Reducer type ring, 1/4NPT connections, 316 SST

Extension

None

Fill fluid

-A

For general (silicone oil), Process–10 to 250°C, Ambient–10 to 60°C

-B

For general (silicone oil), Process–30 to 180°C, Ambient–15 to 60°C

-D

For oil-prohibited (fluorinated oil), Process-20 to 120°C, Ambient-10 to 60°C

-E

For low temperature (ethylene glycol), Process-50 to 100°C, Ambient-40 to 60°C

-1

For high temp. & vacuum (silicone oil), Process-10 to 250°C, Ambient-10 to 60°C

-4

For high vacuum (silicone oil), Process-10 to 100°C, Ambient-10 to 60°C

Capillary connection

Side of diaphragm seal unit

—

Always 2

Capillary length*

10m

Optional codes

/Optional codes

5.4 Diaphragm seal selection 4-inch(100mm)/3-inch(80mm) extend type

Main Code

Suffix Codes

Description

EJA438E

Transmitter body section (I)

Process connection style

-E

Extended type

Flange rating

JIS 10K

JIS 20K

JIS 40K

ANSI class 150

ANSI class 300

JPI class 150

JPI class 300

DIN PN10/16

DIN PN25/40

Process connection size

(Process flange size)

4-inch (100 mm)

3-inch (80 mm)

Flange material

JIS S25C

304 SST

316 SST

Gasket contact surface

Serration (for ANSI flange with wetted parts material SW only)

Flat (no serration)

Wetted parts material

316L SST Diaphragm, 316L SST Others

Flushing connection ring

None

Extension

Length (X2) = 50 mm

Length (X2) = 100 mm

Length (X2) = 150 mm

Fill fluid

-A

For general (silicone oil), Process–10 to 250°C, Ambient–10 to 60°C

-B

For general (silicone oil), Process–30 to 180°C, Ambient–15 to 60°C

-C

For high temperature (silicone oil), Process100 to 310°C, Ambient10 to 60°C

-D

For oil-prohibited (fluorinated oil), Process-20 to 120°C, Ambient-10 to 60°C

-E

For low temperature (ethylene glycol), Process-50 to 100°C, Ambient-40 to 60°C

-1

For high temp. & vacuum (silicone oil), Process-10 to 250°C, Ambient-10 to 60°C

-2

For high temp. & vacuum (silicone oil), Process10 to 310°C, Ambient10 to 60°C

-4

For high vacuum (silicone oil), Process-10 to 100°C, Ambient-10 to 60°C

Capillary connection

Back of diaphragm seal unit

—

Always 2

Capillary length*

10m

Optional codes

/Optional codes

6. Mounting & Dimensions

● Flush type

● Extended type

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EJA438E

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