The PyroDeTec cylinders come in two different capacities: Model PDT-45 (4.5kg or 10lb) and Model PDT-90 (9.0kg or 20lb). They are supplied empty from the factory, with no agent inside.

Each cylinder is fitted with a valve (choice of either brass or nickel-plated) with a quarter-turn ball valve for connecting to the detection tube. Every cylinder valve is equipped with a pressure relief device (rupture disc) and fitted with a straight siphon tube. The cylinder valve, together with the detection tube, forms the heart of the PyroDeTec system.

A = W21.7 x 1/14″
Screw-in connection:
C = W28.8 x 1/14″
Ascending tube thread:
G = G3/8″
Burst Disc Safety Device:
190 Bar
Cylinder Thread:
25E – DIN EN629 – 1
Connection Pressure Gauge:
m12x1, Filling connection = pressure gauge connection
Connection Dip Tube:
Connection Detecting Tube:
Plug in connector for PyroDeTec detecting tube 4×6
Filling connection:
W21.8 x 1/14, filling connection = pressure gauge connection
Material Valve Body:
Pressure gauge:
0 – 350 bar; ∅ 40
Flow diameter:
∅ 12mm
Low pressure:
15 Bar to 20 Bar
Valve seat diameter:
∅ 12mm
Flow rate:
Kv = 2.87/ Cv = 3.33
Flow rate with CO2:
Working pressure:
CO2: Filling ratio CO2 cylinders = max. 0.75 kg/liter
Extinguishing agent:
Carbon dioxide
Safety rupture disk:
200 bar
Safety valve:
35 bar +/- 5 bar
Spring Loaded Safety Device:
30 Bar
Seat Diameter:
Ø 8mm
Temperature Range:
-20°C to + 60°C
Pressure reducing valve:
About 15 bar
Leakage rate with helium:
10-4 mbar l/s
Operating temperature range:
-18°C to 54°C