Model L7661

Detonation In-Line Flame Arrestor L7661

The L7661 model inhibits flame propagation in gas piping systems. It is ideal for protecting liquid storage tanks containing NEC Group D (IEC Class IIA) gases with a maximum experimental safe gap equal to or greater than 0.90 mm.

  • Compact design with high flow capacity and low pressure drop
  • Easy element removal for cleaning and maintenance
  • Elements are economical to replace

Flange sizes: 4″ (DN100) x 16″ (DN400) through 12″ (DN300) x 30″ (DN750)

Standard materials: carbon steel, stainless steel (stainless steel element comes standard)

Pre-ignition system temperatures: -4 to 140°F (-20 to 60°C)

Pre-ignition system pressure: up to 15.7 psia (1.08 bara)

Burn time: tBT 20 minutes

Ideal for: vertical or horizontal installation, in-line or end-of-line deflagrations, unstable detonations

Housing
Size
(Metric)
A
Length
(Metric)
B
Diameter
(Metric)
Approx
Ship.
Wt. Lbs.
(Metric)
16″
(400 mm)
29.63″
(753 mm)
23.50″
(597 mm)
550
(249 kg)
20″
(500 mm)
32.43″
(824 mm)
27.50″
(699 mm)
850
(386 kg)
24″
(600 mm)
38.75″
(984 mm)
32.00″
(813 mm)
1200
(544 kg)
30″
(750 mm)
42.88″
(1089 mm)
38.75″
(984 mm)
1900
(862 kg)

Specifications subject to change without notice. Certified dimensions available upon request.

* Larger sizes available on special applications.

All units with ANSI 150 RF flanges standard (other flange drillings available).

  • Factory-installed thermocouples for flame sensing
  • Corrosion-resistant flame elements
  • Other materials available
  • Sensor ports
  • Large inspection and cleaning ports
  • Swing bolts for fast element removal

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