Used for simultaneous measurement of steam pressure and temperature in refrigeration engineering.

When measuring gases or vapors, the use of this instrument must comply with the safety regulations specified in EN837-2 standard.

model

D7 / D8

Nominal diameter

63 – 80 – 100 (D7)

100 (D8)

Accuracy level (EN 837-1/6)

NG 63: Level 1.6

NG 80 / NG 100: Level 1.0

Range (EN 837-1/5)

-1/+9 bar -1/+12.5 bar

-1/+15 bar -1/+24 bar

-1/+30 bar

Each one has a temperature scale

temperature scales

Corresponding refrigerant

R 134a R 290 R 407A R 404A R744 R717（NH3） R507

Load capacity

Static load: 3/4 x full scale

Dynamic load: 2/3 x Full Scale

Instantaneous peak pressure: full range

operation temperature

Medium temperature: according to the refrigerant

Environmental temperature: T_min= -20 ℃； T_max= +60 ℃

Temperature influence

If the temperature of the measuring element deviates from+20 ℃, a certain deviation will occur: temperature rise: about ± 0.4%/10K

Temperature drop: about ± 0.4%/10K

Full scale percentage value

protection grade

IP 65 (EN 60529)

Case with pressure relief hole (≤ 25bar): IP 54

Process connection

Copper alloy, radial and axial

NG 63-100 D7 center axis

NG 100 D8 axial eccentricity

7/16-20 UNF SAE J514 / ISO 8434-2 (37°), G1/4B,

G1/2B (for R 717 stainless steel 316 Ti/316 L)

Measurements

Spring tube, copper alloy, "C" type tube

(For R717 stainless steel 316 Ti/316 L)

Movement

copper alloy

watch dial

Aluminum, white pressure scale and black numbers

Please refer to the attachment for temperature scale and numerical information

pointer

Aluminum, black

watch case

Stainless steel 304 with pressure relief hole

Cover Ring

D 7 – NG 63 – 80 – 100： Curled edge cover ring, stainless steel 304

D 8 – NG 100： Snap on cover ring, stainless steel 304

window

plastics

Fill with shock-absorbing fluid

Glycerol (99.5%)