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Intrinsic Safety Solenoid Valves

Intrinsic safety valves can be used for applications that require similar explosion class/ignition degree to d2G4 or Exd II BT5 type (explosion-proof enclosure construction). Without need for expensive connection tools and complex installation work that are inevitable for explosion-proof enclosure types, the intrinsic safety valves achieve highly reliable explosion-proof performance.
　Explosion barrier

Intrinsic safety explosion barrier is an explosion-proof device with single channel, shunt-diode DC circuit that enables interactive electric signaling without short circuit while controlling energy transmission in order to prevent ignition in explosive atmosphere.

When serially connected to a transmission circuit, the barrier protects the circuit and components in hazardous area from being affected by a serious accident in the non-hazardous area.

Even in hazardous area conventional connection can be used.

SAF1-5 and SAF2-5 type safety barriers can be connected using solderless terminal connectors.

Model code SAF1-5 MTL728+ SAF2-5
Explosion-proof construction Intrinsic safety construction（i2G4） 

Intrinsic safety construction（ExiaⅡBX)
Rating Rated voltage DC24V
Max. working voltage DC25.5V
Max. allowable voltage DC26.6V
Safety retention voltage AC/DC　250V
Rating of a fuse 50mA
Ambient temp. -10～40℃ -10～60℃
Basic circuit figure
Operating condition 1. Place the valve in non-hazardous area.
2. Perform single grounding using type A ground.
3. Parts and connections cannot be changed.
4. Use with specified solenoid valves.
5. Allowable inductance for external connection: 1mH / Capacitance: 0.05 μF
　454 series　5-port solenoid valves (spool valve)
　 Return Hold

Kind of barrier to combine

 i2G4 SAF1-5-A 454S202F-Yi 454S203F-Yi 454S403F-Yi 454S404F-Yi 454D202F-Yi 454D203F-Yi 454D403F-Yi 454D404F-Yi
MTL728+ 454S202C-Yi 454S203C-Yi 454S403C-Yi 454S404C-Yi 454D202C-Yi 454D203C-Yi 454D403C-Yi 454D404C-Yi
ExiaⅡBT5 SAF2-5-A 454S202G-Ｙｉ 454S203G-Ｙｉ 454S403G-Ｙｉ 454S404G-Ｙｉ 454D202G-Ｙｉ 454D203G-Ｙｉ 454D403G-Ｙｉ 454D404G-Ｙｉ

In the case of other explosion-proof barriers and combination *1

 454S202M-Yi 454S203M-Yi 454S403M-Yi 454S404M-Yi 454D202M-Yi 454D203M-Yi 454D403M-Yi 454D404M-Yi
Structure of the main valve

Pilot spool type 
Port size Rc1/4 Rc3/8 Rc1/2 Rc1/4 Rc3/8 Rc1/2
Effective area of valve 22mm2 40mm2 22mm2 40mm2
Working pressure 0.2～0.7MPa
Ambient temp. -5～50℃
Explosion-proof standard

Intrinsic safety construction
Operating condition 1. Use with specified safety barrier.
　For i2G4 explosion-proof valves, use them with SAF1-5-1 or MTL728+ safety barrier.
　For Exia II BT5 explosion-proof valves, use them with the safety barrier SAF2-5-A or that meets the conditions described below (note *1).
2. Parts and connections cannot be changed.
3. Use 1 explosion-proof barrier for each solenoid valve.
　414/416 series　5-port solenoid valves (Spool valve / Ceramic slide valve)

　

 Return

Kind of barrier to combine

 i2G4 SAF1-5-B 414S302F-Yi 414S303F-Yi 414S603F-Yi 414S604F-Yi 416S302F-Yi 416S303F-Yi 416S603F-Yi 416S604F-Yi
MTL728+ 414S302C-Yi 414S303C-Yi 414S603C-Yi 414S604C-Yi 416S302C-Yi 416S303C-Yi 416S603C-Yi 416S604C-Yi
ExiaⅡBT5 SAF2-5-B 414S302G-Yi 414S303G-Yi 414S603G-Yi 414S604G-Yi 416S302G-Yi 416S303G-Yi 416S603G-Yi 416S604G-Yi
In the case of other explosion-proof barriers and combination *1 414S302M-Yi 414S303M-Yi 414S603M-Yi 414S604M-Yi 416S302M-Yi 416S303M-Yi 416S603M-Yi 416S604M-Yi
Structure of the main valve Pilot spool type  Pilot ceramic slide type
Port size Rc1/4 Rc3/8 Rc1/2 Rc1/4 Rc3/8 Rc1/2
Effective area of valve 25mm2 30mm2 51mm2 60mm2 24mm2 28mm2 51mm2 60mm2
Working pressure 0.2～0.7MPa 0.12～0.7MPa
Ambient temp. -5～50℃ -10～60℃
Explosion-proof standard Intrinsic safety construction
Operating condition 1. Use with specified safety barrier.
　For i2G4 explosion-proof valves, use them with SAF1-5-1 or MTL728+ safety barrier.
　For Exia II BT5 explosion-proof valves, use them with the safety barrier SAF2-5-A or that meets the conditions described below (note *1).
2. Parts and connections cannot be changed.
3. Use 1 explosion-proof barrier for each solenoid valve.
　414/416 series　5-port solenoid valves (Terminal block ZA) (Spool valve/Ceramic slide valve)
　 Return
Kind of barrier to combine i2G4 SAF1-5-B 414S302F-YAｉ 414S303F-YAｉ 414S603F-YAｉ 414S604F-YAｉ 416S302F-YAｉ 416S303F-YAｉ 416S603F-YAｉ 416S604F-YAｉ
ExiaⅡBT5 SAF2-5-B 414S302G-YAｉ 414S303G-YAｉ 414S603G-YAｉ 414S604G-YAｉ 416S302G-YAｉ 416S303G-YAｉ 416S603G-YAｉ 416S604G-YAｉ
In the case of other explosion-proof barriers and combination *1 414S302M-YAｉ 414S303M-YAｉ 414S603M-YAｉ 414S604M-YAｉ 416S302M-YAｉ 416S303M-YAｉ 416S603M-YAｉ 416S604M-YAｉ
Structure of the main valve Pilot spool type  Pilot ceramic slide type
Port size Rc1/4 Rc3/8 Rc1/2 Rc1/4 Rc3/8 Rc1/2
Effective area of valve 25mm2 30mm2 51mm2 60mm2 24mm2 28mm2 51mm2 60mm2
Working pressure 0.2～0.7MPa 0.12～0.7MPa
Ambient temp. -5～50℃ -10～60℃
Explosion-proof standard Intrinsic safety construction
Operating condition 1. Use with specified safety barrier.
　For i2G4 explosion-proof valves, use them with SAF1-5-1 or MTL728+ safety barrier.
　For Exia II BT5 explosion-proof valves, use them with the safety barrier SAF2-5-A or that meets the conditions described below (note *1).
2. Parts and connections cannot be changed.
3. Use 1 explosion-proof barrier for each solenoid valve.

note　＊1

In the case of other barriers and combination

Konan 454, 414, 416 series intrinsic safety solenoid valves have passed equipment qualification tests for intrinsic safety solenoid valve.

The valves can be used in combination with the safety barrier that meets the following conditions. (The valves can be used with insulation barrier that does not need type A ground.)

The barrier used in combination with the valves should be the one that has passed equipment qualification tests for a barrier and that meets the following conditions.
Safety retention voltage Maximum voltage of a intrinsic safety circuit Less than 29.4V
Maximum current of a intrinsic safety circuit Less than 93.8mA
Electric power of a intrinsic safety circuit Less than 0.689W

Performance classification / Group

 Performance classification ia
Group ⅡB or ⅡC

Allowable inductance (Lo) and capacitance (Co) for an intrinsic safety circuit and relationship between inductance (Lo) and capacitance (Cw) for external connections to the intrinsic safety circuit

Allowable inductance of a intrinsic safety circuit：Lo≧Li+Lw（mH）

Allowable capacitance of a intrinsic safety circuit：Co≧Ci+Cw（μF）
 
 
 
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