Documents

Applications

2017.11.7

Followings are category per application for pressure gauge.

Application

Operational conditions

General

1. Conditions at an installation

Type	Specification	Zone	Ambient and Pressure Medium Temp.	RH	Protection against splash such as rain, snow and hailstone
	Item
General	JIS B 1804 Environmental Class-C Class C1	Enclosed area	-5 to 45°C	5 to 95% (No freezing)	N/A
Sealed(Closed)	-	Outdoors	Outdoors	Outdoors	A (refer to relevant page)

2. Installation position:Pressure gauges should be installed in vertical directions, dial and its indications should be in horizontal direction for the line of sight.

3. Vibration and shock: The pointer must not be exceeded the specified pressure range of the tolerance of measurement accuracy.

4. Pressure medium: Non-corrosive fluids or gasses (for non-corrosive performance should be used SUS316 for wetted parts.)

5. Working pressure: The upper limit of normal working pressure range is specified in the table below.

Less than 2/3 of the maximum pressure (1/2 if the maximum pressure is 100Mpa or more)

*(1) Steady	Less than 3/4 of the maximum pressure (2/3 if the maximum pressure is 100Mpa or more)
*(2) Variable	Less than 2/3 of the maximum pressure (1/2 if the maximum pressure is 100Mpa or more)
Vacuum pressure	Maximum pressure

Remark
*(1) Steady pressure: The change rate if pressure per second must be less than 1% of the pressure span and per minute must be less than 5% of the pressure span.
*(2) Variable pressure: It fluctuates 1 to 10% per second of the pressure span.

Steam

1. The ambient Temp.: should be within 10 - 50°C, temporally becomes high temperature like steam at the start of operation.

2. Other conditions: refer to Ordinary conditions 2, 3, 4 and 5.

3. Symbol M: is displayed to indicate the heatproof type of use.

Heatproof

1. Maximum ambient Temp.: 80°C

2. Other conditions: refer to Ordinary conditions 2, 3, 4 and 5.

3. Symbol H: is displayed to indicate the heatproof type of use.

Vibration-proof
(for Intense vibration)

1. Pulsation or vibration: the degree of pulsation or vibration that causes the pointer to shake beyond the accuracy tolerance, is specifically within the following range in the table below.

[Pulsation range]

After continuously applying pulsation pressure below 1Hz, there shall be no functual abnormality tithin the accuracy tolerance..

Max. Pressure(Mpa)	Pulsation Range (% vs. Mpa)	Frequency
Max. Pressure(Mpa)	Pulsation Range (% vs. Mpa)	Vibration-resistant	{Intense vibration-resistant}
Mpa <= 10	30-70	15,000	{500,000}
10 < Mpa =< 60	40-60	10,000
60 < Mpa =< 160	40-60	5,000

[Vibration range]

Mount in normal posture and carry out the test in three directions, look for a resonance point with conditions given in table below and then excite for 2 hours and carry out the instrumental error test. When the resonance point cannot be found, apply the vibration of +/- 6.9m/s 30Hz in each of three directions for two hours or longer.

FRQ	Amplitude(mm)	Acceleration m/s²	Acceleration(m/s 2)
5 - 13.2	±1.0	-	-
13.2 - 100	-	±6.9	±6.9

2. Other conditions: refer to Ordinary conditions 1, 2 4 and 5.

3. Symbol V: is displayed to indicate the vibration-proof type of use.

Steam/Vibration- proof

1. Conditions: have the characteristics of both steam and vibration-proof.

2. Symbol MV: is displayed to indicate the steam/vibration-proof type of use.

Heat-/Vibration proof

1. Conditions: have the characteristics of both heat and vibration-proof.

2. Symbol HV: is displayed to indicate the steam/vibration-proof type of use.

{ }: is a standard established by our company to improve performance and does not apply to JIS B 7505.

Documents

Applications

1. Conditions at an installation

2. Installation position:Pressure gauges should be installed in vertical directions, dial and its indications should be in horizontal direction for the line of sight.

3. Vibration and shock: The pointer must not be exceeded the specified pressure range of the tolerance of measurement accuracy.

4. Pressure medium: Non-corrosive fluids or gasses (for non-corrosive performance should be used SUS316 for wetted parts.)

5. Working pressure: The upper limit of normal working pressure range is specified in the table below.

1. The ambient Temp.: should be within 10 - 50°C, temporally becomes high temperature like steam at the start of operation.

2. Other conditions: refer to Ordinary conditions 2, 3, 4 and 5.

3. Symbol M: is displayed to indicate the heatproof type of use.

1. Maximum ambient Temp.: 80°C

2. Other conditions: refer to Ordinary conditions 2, 3, 4 and 5.

3. Symbol H: is displayed to indicate the heatproof type of use.

1. Pulsation or vibration: the degree of pulsation or vibration that causes the pointer to shake beyond the accuracy tolerance, is specifically within the following range in the table below.

[Pulsation range]

[Vibration range]

2. Other conditions: refer to Ordinary conditions 1, 2 4 and 5.

3. Symbol V: is displayed to indicate the vibration-proof type of use.

1. Conditions: have the characteristics of both steam and vibration-proof.

2. Symbol MV: is displayed to indicate the steam/vibration-proof type of use.

1. Conditions: have the characteristics of both heat and vibration-proof.

2. Symbol HV: is displayed to indicate the steam/vibration-proof type of use.

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