ARI Armaturen SAFE-TCP/TCS950 EN - Manual (Page 16)

Page 2-16 Rev. 0040401000 2913
Operating and installation instructions
SAFE, SAFE-P, SAFE-TC, SAFE-TCP/TCS
Flange broken. Damage during transport. Replace safety valve.
Flange bolts not evenly tightened. Replace safety valve.
Transfer of forces such as bending or
torsional forces. Install free of tension.
Pressure surges. Safety valve not installed at highest
point. Install safety valve at highest point.
Valve drainage inadequate or not fitted. Install drainage system a required by
regulations.
Valve constantly blows off. Transport fastening not removed. Remove transport fastening (red screw
above cap, Figure 990).
Spring corroded by medium and
broken. Replace safety valve.
In the case of vapour, select open cap
or bonnet if possible.
Injury owing to medium. Danger of injury from medium (e.g.
liquids) emerging from valve. Replace safety valve.
Select design with closed bonnet and
cap.
Install a guard if necessary.
Injury from vapour discharge
(open bonnet / cap) Install a guard if necessary
Flattering. Pressure loss >3% in line to valve. Reduce resistance by chamfering or
radius in connection socket. Select
larger line if necessary.
Poor welding (root pass), gaskets at
inlet and outlet flanges too small or not
concentric. Change conditions.
Safety valve capacity too high. Install smaller safety valve.
Burner capacity too low. Install smaller safety valve.
Blow-off line too long or diameter too
small. Use larger diameter or back-pressure
compensation by stainless steel
bellow.
Inlet and/or outlet socket too small. Install with dimensions larger than DN
of inlet and outlet lines.
Back-pressure higher than 10%. Install stainless steel bellow for
pressure compensation.
Capacity too low. Safety valves not applied unsuitable for
plant conditions. Select and install suitable safety
valves.
Safety valve not applied in line with
current DIN, AD, TRD, etc. rules. Adjust conditions.
Fault Possible cause Corrective measures