WIKA L990.36 Specifications

Diaphragm Seals

Application

Process industry diaphragm seal to combine with Bourdon tube
pressure gauges. Intended for corrosive, contaminated, hot or
viscous pressure media.

Design

Body with flush diaphragm which requires system fill fluid to transmit
pressure to the instrument.

Process Connection

1/2” NPT to 1” NPT

Instrument Connection

¼” or ½” NPT-female
Suitable Pressure Ranges (Glycerin KN7)

DM 0.7” 2 ½” Gauge: 1500PSI to 9000PSI

4 and 4 ½” Gauge: not available

DM 0.9” 2 ½” Gauge: 160PSI to 9000PSI

4 and 4 ½” Gauge: 1500PSI to 9000PSI

DM 1.0” 2 ½” Gauge: 160PSI to 9000PSI

4 and 4 ½” Gauge: 1000PSI to 9000PSI

Diaphragm-Type Diaphragm Seal

High Pressure Flush Diaphragm Seals

Type L990.36

Available Options (connections, materials, flushing ports, etc.)
See Selection Guide (over)

To determine the effects of temperature and response time in a
specific application, contact the factory for an Application
Questionnaire. The information provided will allow WIKA Technical
Support to accurately model your application parameters using state­of-the-art computer simulation techniques.

ACS L990.36

(ACS 99.13)

Selection Guide - L990.36

L990.36,1/4FX1/2M,SS,SS

Notes

1. Available with G3/4B or G1B
connection only. Minimum
pressure range 1500 PSI.
Running nut is 316 stainless
steel.

2. Minimum pressure range
160 PSI depending on
diaphragm size.

3. Minimum pressure range
1500 PSI.

4. Body and diaphragm must
be the same material.

5. Upper housing is a process
wetted component.

Items in

bold

stock (subject to prior sales).
For optional items, consult
factory for current lead-time.

are av ail able from

Instrument Connection

1/4F = 1/4” NPT female
1/2F = 1/2” NPT female

G1/4 = G1/4 female
G1/2 = G1/2 female

Diaphragm Seal Design (Pressure rating – 9,000PSI)

L990.36 = Flush Diaphragm, male pipe thread (See note 2)

Diaphragm Material (See note 4)

SS = 316 stainless steel

MO = Monel
HC = Hastelloy
TI = Titanium, grade 2

®

400

®

C-276

Body Material (See note 4 & 5)

SS = 316 stainless steel

MO = Monel
HC = Hastelloy® C-276
TI = Titanium, grade 2

®

400

Process Connection

1/2M = 1/2” NPT male (See note 3)

3/4M = 3/4” NPT male

1.0M = 1” NPT male

1.5M = 1-1/2” NPT male

2.0M = 2” NPT male

G1/2B = G1/2B male thread (See note 3)
G3/4B = G3/4B male thread
G1.0B = G1B male thread
G1.5B = G1-1/2B male thread

Options not listed may be available, please consult factory.
Fill Fluid & Mounting options: Please reference data sheet ACS 99.MO

THE MEASURE OF

Total Performance

Ordering Information:

State computer part number (if available) / type number / size /
range / connection size and location / options required.

Specifications given in this price list represent the state of engineering at the time of printing.
Modifications may take place and the specified materials may change without prior notice

05/01

TM

WIKA Instrument Corporation

1000 Wiegand Boulevard
Lawrenceville, Georgia 30043-5868
Tel: [phone] Fax: [phone]
http://www.wika.com e-mail: [e-mail]