Stafsjö D2G Instrucciones De Instalación Y Servicio página 51

C4 Dysfonctionnement
Problem
Leakage from stuffing box
packing
Leakage at
flange connection
Leakage through valve
bore
Gate does not open/close
completely
Gate does not open/close
in a smooth movement
Too large force to
open/close the gate
(too high hand force as
well)
* Lors du serrage des boulons du presse-étoupe : voir Tableau (section B7)
Stafsjö propose d'effectuer des opérations de maintenance sur les vannes. Pour plus d'informations, contactez Stafsjö
ou votre revendeur local.
La responsabilité de Stafsjö sur le produit cesse si des pièces d'usure non testées et approuvées par Stafsjö ont été
utilisées sur la vanne. La responsabilité de Stafsjö sur le produit cesse si les instructions de maintenance n'ont pas été
respectées pendant les opérations de maintenance.
Reason
Gland bolting too loose*
Worn-out box packing
Incorrectly installed box packing
Damaged gate
Wrong length of bolts in flanges
Loose flange bolting
Valve not centred at flange connection
Valve not parallel to flanges
Gasket not centred
Wrong gasket material
Worn-out seat/sealing profile
Valve does not close 100%
Damaged seat or gate
Fault in actuator
Fault in limit switch setting
Valve clogged
Damaged seat/sealing profile or gate
Fault in actuator
Valve clogged
Damaged seat/sealing profile or gate
Not enough air supply pressure
Not enough air flow supply
Gland nuts tightened by too high torque
Valve exposed to stress/tension
Valve clogged or deformed
Damaged seat/gate
Measure
See relevant maintenance instructions
issued by Stafsjö
Download: www.stafsjo.com
See this instruction, section B7
See Stafsjö's maintenance instructions and
relevant data sheet
Download: www.stafsjo.com
See relevant maintenance instructions
issued by Stafsjö
Download: www.stafsjo.com
See instruction for actuator (if any)
See instruction for actuator/accessories
See the relevant maintenance instructions
issued by Stafsjö
Download: www.stafsjo.com
See the relevant instruction for actuator
See relevant maintenance instructions
issued by Stafsjö
Download: www.stafsjo.com
See the relevant maintenance instructions
issued by Stafsjö
Download: www.stafsjo.com
Document : is-VALVE, 21-02-11, édition : 15