Specialized manufacturer of Digital Pressure Meters and Load Cells

VALCOM CO.,LTD.

NEW

Intrinsically safe explosion-proof for pressure sensor Zener-barrier
Zener-barrier series VEK216

Zener-barrier
  • Explosion-proof rate
    Zener-barrier: ⅡC / Pressure sensor: ⅡC T4 Ga
Applicable Sensor VPRF(IS), VPRQ(IS), VPRQF(IS), VPRNP(IS)
Measured medium VPRF(IS), VPRQ(IS), VPRQF(IS): SUS630 and 15-5PH (precipitation-hardened stainless steel)
VPRNP(IS): Media that will not corrode SUS316L (Refer to the individual specifications.)
Measured Range VPRNP(IS): 100 to 1700kPa or 100 to 1700kPa abs
VPRQ(IS), VPRF(IS): 1 to 50MPa
VPRQF(IS): 1 to 100MPa
(Refer to the individual specifications.)

[Zener-barrier] Specifications

TIIS Certification Number No. TC22249
Model VEK216
Explosion-proof structure Intrinsic safety explosion-proof structure (To be installed in non-hazardous area)
Explosion-proof performance [Ex ia] ⅡC
Grounding Independent class A grounding required.
Rating Max. voltage of intrinsically safe circuit: 14.4V
Max. current of intrinsically safe circuit: 150mA
Max. power of intrinsically safe circuit: 270mW
Max. inductance allowed in the intrinsically safe circuit: 0.79mH
Max. capacitance allowed in the intrinsically safe circuit: 335nF
Max. voltage allowed in the non-intrinsically safe circuit: 250V AC 50/60Hz, 250V DC
Ambient Temperature: -20 to ;+60°C

[Pressure sensor] Specifications

TIIS Certification Number No. TC22316X No. TC22317X
Applicable sensor series VPRNP(IS) VPRF(IS) VPRQ(IS) VPRQF(IS)
Explosion-proof structure Intrinsically safe explosion-proof structure
Explosion-proof performance Ex ia ⅡC T4 Ga
Input voltage ±2.5V or 5V
Rating Max. voltage allowed in the intrinsically safe circuit: 14.4V
Max. current allowed in the intrinsically safe circuit: 150mA
Max. power allowed in the intrinsically safe circuit: 0.270W
Inside inductance: 0.28mH
Inside capacitance: 32nF
Ambient Temperature: VPRF(IS), VPRQ(IS), VPRQF(IS): -20 to +60°C, VPRNP(IS): -20 to +50°C
Measured medium VPRF(IS), VPRQ(IS), VPRQF(IS): SUS630 and 15-5PH (precipitation-hardened stainless steel),
VPRNP(IS): Media that will not corrode SUS316L
[terms of use]
Risk of ignition by shock or friction
Aluminum alloy is included in the structural material of the enclosure.
Since the mass fraction of the aluminum alloy is more than the predetermined value, there is a potential risk of ignition. Do not drop the product or subject it to excessive shock or friction.
Risk of electrostatic charge
Non-metallic materials are included in the surface of the enclosure.
To avoid the risk of ignition, take measures to prevent electrostatic charge.

Model Selection

Example

Photo ①Model ②Rated Capacity(R.C.) ③Cable Connection ④Connection Screw ⑤Length(Cable)
VPRF(IS) 1MP(1MPa)
2MP(2MPa)
5MP(5MPa)
10MP(10MPa)
20MP(20MPa)
50MP(50MPa)
Blank
(Standard connector)
W
(Waterproof connector)
G3/8 3m(Standard)
5m
10m
□□m

If you prefer
other length(*3)
VPRQ(IS) 1MP(1MPa)
2MP(2MPa)
5MP(5MPa)
10MP(10MPa)
20MP(20MPa)
35MP(35MPa)
50MP(50MPa)
R3/8
VPRQF(IS) 1MP(1MPa)
2MP(2MPa)
5MP(5MPa)
10MP(10MPa)
20MP(20MPa)
35MP(35MPa)
50MP(50MPa)
100MP(100MPa)
G3/8
(100MPa: G1/2)
VPRNP(IS) Guage Pressure 100(100kPa)
200(200kPa)
700(700kPa)
1700(1700kPa)
R3/8
G3/8
Specify thread size.
Absolute Pressure 100A(100kPa abs)
200A(200kPa abs)
700A(700kPa abs)
1700A(1700kPa abs)
Cable length
  • Note
  • *1 Always use in combination with VALCOM amplifier.
    Models are subject to change in part due intrinsic safety or explosion-proof purpose. Always contact our sales office for confirmation.
  • *2 Please order the cable length between VALCOM amplifier and Zener-barrier.
  • *3 Between Conformity sensor and Zener-barrier use dedicated to cable for safe explosion-proof. (Max 200m / VPRNP guage pressure · W (Waterproof connector): Max 100m)

Examples of explosion-proof construction

(1) Pressure sensor
Examples of explosion-proof construction

(2) Zener-barrier
Examples of explosion-proof construction

①EPL
Ga Equipment having a very high level of protection that can be used in particularly hazardous locations.
Gb Equipment having a high level of protection that can be used in Group I explosive gas atmospheres.
Gc Equipment having an enhanced level of protection that can be used in Group II explosive gas atmospheres.
② Temperature class
T1 Maximum surface temperature: Over 300°C and 450°C or less
T2 Maximum surface temperature: Over 200°C and 300°C or less
T3 Maximum surface temperature: Over 135°C and 200°C or less
T4 Maximum surface temperature: Over 100°C and 135°C or less
T5 Maximum surface temperature: Over 85°C and 100°C or less
T6 Maximum surface temperature: 85°C or less
③ Electrical equipment group
ⅡA Representative gas: Propane
ⅡB Representative gas: Ethylene
ⅡC Representative gas: Hydrogen
Only Group Ⅱ (Intended for use in locations where explosive gas atmospheres exist other than in a mine susceptible to firedamp) subdivisions are listed.
Electrical equipment in Group Ⅱ are subdivided according to the nature of the explosive gas atmospheres in which the equipment is to be used, as shown in the table below (*4).
④ Explosion-proof construction
ia Meets the requirements of intrinsically safe explosion-proof construction.
d Meets the requirements of flameproof enclosure.

Typical Explosive Gas Groups and Temperature Classes (*4)

  Temperature class
T1 T2 T3 T4 T5 T6
Group ⅡA Acetonitrile
Acetone
Ammonia
Ethane
Isopropyl chloride
M-xylene
P-xylene
Acetic acid
Ethyl acetate
Ethyl bromide
Styrene
1,2,4-Trimethylbenzene
Toluene
Propylene
Benzene
Methane
Acetylacetone
Isopentane
Vinyl chloride
O-xylene
Isopentyl acetate
Vinyl acetate
Butyl acetate
Propyl acetate
Pentyl acetate
Methyl acetate
Diisopropyl ether
Cyclohexanone
1.2-Dichloroethane
Chiofeng
1-Butanol
Butane
Propane
2-Propanol
1-Pentanol
Acetic anhydride
Methyl methacrylate
Methanol
Butyl chloride
Octane
Cyclohexane
Deccan
Butyraldehyde
Hexane
Heptane
Pentane
Acetaldehyde   Ethyl nitrite
ⅡB Methyl acrylate
Acrylonitrile
Carbon monoxide
Hydrogen cyanide
Ethyl acrylate
Ethanol
Ethyl methyl ketone
Ethylene
Ethylene oxide
Epichlorohydrin
1,4-Dioxane
1,3-Butagen
Franc
Propylene oxide
Dimethyl ether
Tetrahydrofuran
1-Hexanol
(di)ethyl ether
Dibutyl ether
   
ⅡC Water gas,
Hydrogen
Acetylene       Carbon bisulfide

[Note]
This table summarizes the classification of flammable gases and vapors according to the explosion-proof construction of electrical equipment.
It is intended as a basic reference for electrical technicians to be used for classifying hazardous locations and for selecting electrical equipment having adequate explosion-proof performance.
Ignition point, explosion limit, and flash point are discussed in many literatures. Consult them by yourself to select appropriate explosion-proof equipment.
(Reference) TECHNICAL RECOMMENDATION OF NATIONAL INSTITUTE OF OCCUPATIONAL SAFETY AND HEALTH "USER'S GUIDELINE for Installations for Explosive Atmospheres in General Industry" JNIOSH-TR-NO.44 (2012)

External dimensions (Unit: mm)

External dimensions

Wiring diagram

Wiring diagram

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