IDV™ Inline Design Valve

Inline body design reclosing Safety Relief Valve, with conventional and/or balanced (bellows) designs.

IDV™ Inline Design Valve

Performance Features

  • In-line design with the same inlet and outlet flangeconnection size
  • Compact and light weight compared to traditional API safety relief valves
  • Superior capacity to API safety relief valves
  • ANSI/ASME B 16.5 and International flange connections
  • Optional integrated rupture disk at lnlet of valve
  • Smaller size; may be able to use a smaller valve size
  • Convenience of an in line flanged design
  • Install horizontally or vertically
  • Set pressure independent of back pressure, suitable for variable back pressure applications


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  • Set Pressures
  • Tolerance
  • Materials
  • Documentation

Set Pressures

IDV™ Nominal Size
Inlet Size Outlet Size Flow Area* Set Pressure Range Media Code Section
1 1  0.66 sq in 15-500 psi Air XIII
1.5 1.5 1.59 sq in 15-500 psi Air XIII
2 2 2.69 sq in 15-500 psi Air XIII
3 3 5.95 sq in 15-500 psi Air XIII
4 4 10.40 sq in 15-500 psi Air XIII
6 6 23.52 sq in 15-500 psi Air XIII
8 8 41.27 sq in 15-500 psi Air XIII
10 10 64.78 sq in 15-500 psi Air XIII

 

IDV Typical Weight
IDV Size (in) IDV Weight (lbs) SRV Size (in) SRV Weight (lbs) Weight Comparison
1 40 1 x 2 42 95
1.5 50 1.5 x 2 58 86
2 80 2 x 3 84 95
3 126 3 x 4 146 86
4 182 4 x 6 260 70
6 294 6 x 8 412 71
8 406 8 x 10 660 62
10 568 10 x 14 1135 50

Burst Tolerance

Marked Burst Pressure Burst Tolerance
> 40 psig (> 2.7 barg) ± 5%
< 40 psig (< 2.7 barg) ± 2 psi
Operating Pressure Ratio 90% of set point over 1.38 barg; 90% of minimum below 1.38 barg.

Materials of Construction

Minimum Standard Materials
  Carbon Steel Stainless Steel Low Temp Carbon Steel
Body ✓ ✓ ✓
Disc and Spindle (Internals)   ✓  
Alternative Materials availabile upon request, e.g Inconel 625, Duplex, Supler Duplex

Flange Torque*

Size Flange Rating Number of Studs Diam. Of Studs Minmum Length of Studs Stud Torque
in mm ANSI in in mm ft-lbs N-m
1 25 150 4 0.5 4 101.6 23 31
1.5 40 150 4 0.5 4.5 114.3 27 37
2 50 150 4 0.625 4.25 108 51 69
3 75 150 4 0.875 5.25 133.3 60 82
4 100 150 8  0.625 5 127 51 70
6 150 150 8 0.75 5.75 146 85 115
8 200 150 8 0.75 6 152.4 97 132
10 250 150 12 0.875 6.5 165.1 127 173

Product Literature

The IDV™ Safety Valve Brochure

Installations

IDV Relief Valve Installation Instruction

IDV Safety Valve Series Types

Disk Type
IDV Conventional / Standard (IDV) Valve
IDV-B IDV with a Bellows to isolate spring
IDV-C Standard IDV with Rupture Disk Cassette inserted into the inlet
IDV-H Standard IDV with an integrated Safety Head Outlet Flange
IDV-CB IDV-C with bellows
IDV-HB IDV-H with bellows

IDV Relief Valve Explosion View