Specification of SS Junction Box

(Junction box shall be suitable for operating in humid and corrosive atmosphere)

1. Material of construction : Stainless steel SS316L

2. Type of protection : Increased safety – Ex e Group IIC/IIB+H2 T6 certified as

IEC60079-7 confirming to hydrogen gas environment.

3. IP Protection : IP66 as per IEC 60529 for weather proofing

4. Gasket : Endless neoprene

5. Finish : Electro polished

6. Cover Fixing : Hinged Type

7. Earthing : 2 Nos of External and Internal earthing required

8. Cable entry : 3 way cable entry (sideways and bottom)

9. Cable entry size :M75*1.5mm,M50*1.5mm M25*1.5mm

10. Cable glands : SS double compression cable glands suitable for the

above cable entry size required.

11. Cable entry Plug : Aluminium Plug (closure) suitable for the above

cable entry closing is also required.

12. Cable Termination : Terminal blocks (DIN Rail mounted) cage clip on type

required for cable of 2.5/4 sq.mm required.

Terminal blocks are to be numbered on both sides.

13. Junction mounting : Each J.B shall have 4 lugs for fixing on wall or

fabricated support. Two of holes shall be round and

other two oblong to facilitate correct positioning.

14. Name plate : SS nameplate indicating, JB tag required. shall be fixed by screws.

15. Junction Box Dimensions: (approx)

Sl. No

Type Dimensions (Width*Height*Depth)

in mm

Terminal Blocks

required (Nos)

Cable entry size and quantity

M75* 1.5mm

M50* 1.5mm

M25* 1.5mm(on each side)

Width Height Depth

1 Type 1 600 400 200 240 nos 3 3 15

2 Type 2 400 400 200 140 Nos 3 3 10 16. Accessories:All screws, nuts, studs required for mounting shall be made SS &

supplied.

17. Certificate : Approvals for ATEX to be provided at time of delivery.

18. Detailed drawings are to be provided with quote.

Specification SOV cubicles with explosion proof junction boxes

These SOV Cubicle Boxes are required for housing high pressure Solenoid Valves in hazardous (IIC)

area. Each cubicle houses 5 No. of Solenoid valves [SOV]. 2 Nos of Electrical Junction Boxes (J/B), certified

for hazardous environment (IIC certification), are attached to weather proof cubicle for providing electrical

interfacing to SOVs.

1.1 SOV Cubicle specification:

Housing Material : Stainless Steel SS304/SS316

Thickness of housing material : 4mm thickness minimum

Dimensions of Housing : 720*450*320 mm (approx)

(length*width*depth) in mm : To be suitable for mounting 5 Nos of 5/2 or 3/2 way

Solenoid Valves (refer drawing attached)

Working Fluid : Gaseous Nitrogen (GN2)

Operating pressure : 4.7 MPa ± 10%

Protection certification : IP66

Dimensions of the Cubicle (approx.) : Schematic of existing valve cubicle is enclosed in

Annexure-A. However the supplier may provide general

Arrangement drawing. Only after approval from the

department [IPRC], the supplier may proceed for

fabrication.

Box finish : Electro polished / shade631 IS:5(Light Grey) epoxy base

Pneumatic connection : Suitable for fixing bulk head union for 6mm/ 8 mm/ 12mm

OD SS tubes

1.2 Integral Electrical Termination Box (Junction Box):

No. of Junction Boxes : 2 Nos

Dimension of junction box (L*W*H) : 200*200*150 mm

No. of terminals : 10 Nos of clipon gage type Terminal blocks per

Junction box.

Cable Glands : 2, one each per Junction box for supporting 10

core armoured cable of 18 AWG(M25*1.5mm)

1.3 General Specifications of Valve cubicle with integral Electrical Termination box:

Locking arrangement : Lock arrangement required.

Cover mounting : Hinged for SOV Cubicle box

Tag Plate : Embedded Tag plate on cubicle and Junction Boxes

Transit Arrangement : Lifting Hook to be provided

Interconnection : SOV cubicle and JB to be interconnected by sealed nipple

Sealing of Junction boxes and Valves cubicle : Certified for IP66

Certification Box & Cable Gland : Ex e IIC T6.

Earth plates and bolts for grounding to be provided

Quantity: 5 Nos

1.4 Specification of Header to be supplied to be quoted separately

Each SOV cubicle shall have a common header for command gas. The header shall be mounted

firmly inside the SOV cubicle. Header shall be an SS pipe having one inlet with SS flange and 5 outlets with

¼” NPT( female). The outlet port should be nearer to the SOV mounting position.

SS Flange details:

Nominal Size (NB) : DN25

ANSI Class rating : Class 600 (600 #)

End connection : Socket weld raised face (SWRF)

Material : SS 304L

Relevant standard : ANSI B16.5

SS Pipe details:

Material : Austentic stainless steel 304L

Nominal pipe size: DN 25

Schedule Number: 40S

Note: The header shall be qualified and test certificates shall be provided.

Pressure test of 20 bar, DP test ,Leak test