When this type of valve is tripped,

When this type of valve is tripped, the flow is quickly stopped and an indicator disc tells the operator that the electrical circuit has been opened by a failure somewhere in the system. When the system failure has been corrected so that the circuit is again closed, the valve can be opened by the action of the hand lever. If, however, the system failure has not been satisfactorily corrected, the circuit will remain open and moving the hand lever will not open the valve, because the valve stem remains disengaged from the handle.

In a solenoid-operated safety shutoff valve, a spring action closes the valve instantly when an electric current fails and the solenoid ceases to be energized. The solenoid circuit is generally arranged so that it is broken upon failure of any element of the system. This valve cannot be re-opened until the solenoid is again energized.

A safety shutoff valve should be fail-safe, that is close upon failure of any element of the input control system (such as temperature controllers, steam pressure controllers), air pressure, fuel pressure, current from a flame detector, or current from other safety devices such as low water cutoff, and high pressure cutoff.

However, sudden closing of a valve in a piping system may lead to water hammer or implosion so in special cases there may be additional items connected to the shutoff valve, such as a pressure relief valve or an aerator valve.

The coil of the valve solenoid must be connected in series with all of the elements. For this to operate, fuel, air and steam pressure can be converted to electrical signals by means of bellows, a bourdon tube, or a diaphragm-operated mercury switch

Hasil (Bahasa Indonesia) 1:

When this type of valve is tripped, the flow is quickly stopped and an indicator disc tells the operator that the electrical circuit has been opened by a failure somewhere in the system. When the system failure has been corrected so that the circuit is again closed, the valve can be opened by the action of the hand lever. If, however, the system failure has not been satisfactorily corrected, the circuit will remain open and moving the hand lever will not open the valve, because the valve stem remains disengaged from the handle.In a solenoid-operated safety shutoff valve, a spring action closes the valve instantly when an electric current fails and the solenoid ceases to be energized. The solenoid circuit is generally arranged so that it is broken upon failure of any element of the system. This valve cannot be re-opened until the solenoid is again energized.A safety shutoff valve should be fail-safe, that is close upon failure of any element of the input control system (such as temperature controllers, steam pressure controllers), air pressure, fuel pressure, current from a flame detector, or current from other safety devices such as low water cutoff, and high pressure cutoff.However, sudden closing of a valve in a piping system may lead to water hammer or implosion so in special cases there may be additional items connected to the shutoff valve, such as a pressure relief valve or an aerator valve.Kumparan katup solenoid harus dihubungkan secara seri dengan semua elemen. Untuk beroperasi, tekanan bahan bakar, air dan uap dapat dikonversi ke sinyal-sinyal listrik melalui Bellow, tabung bourdon atau saklar dioperasikan diafragma Merkurius

Hasil (Bahasa Indonesia) 2:

Saat ini jenis katup tersandung, aliran ini cepat berhenti dan disc indikator memberitahu operator bahwa rangkaian listrik telah dibuka oleh kegagalan di suatu tempat dalam sistem. Ketika kegagalan sistem telah diperbaiki sehingga sirkuit lagi ditutup, katup dapat dibuka oleh aksi tuas tangan. Namun, jika kegagalan sistem belum memuaskan diperbaiki, sirkuit akan tetap terbuka dan memindahkan tuas tangan tidak akan membuka katup, karena batang katup tetap terlepas dari pegangan.

Dalam katup pengaman penutup solenoid dioperasikan, pegas aksi menutup katup seketika saat arus listrik gagal dan solenoid berhenti untuk energi. Rangkaian solenoid umumnya diatur sehingga rusak pada kegagalan dari setiap elemen dari sistem. Katup ini tidak dapat dibuka sampai solenoid ini kembali energi.

Sebuah katup pengaman penutup harus gagal-aman, yang dekat pada kegagalan dari setiap elemen dari sistem kontrol input (seperti pengendali suhu, pengendali tekanan uap), tekanan udara , tekanan bahan bakar, saat ini dari detektor api, atau arus dari perangkat keselamatan lain seperti cutoff air rendah, dan cutoff tekanan tinggi.

Namun, penutupan tiba-tiba katup dalam sistem perpipaan dapat menyebabkan air palu atau ledakan sehingga dalam kasus khusus ada mungkin item tambahan terhubung ke katup penutup, seperti katup pelepas tekanan atau katup aerator.

kumparan dari solenoid valve harus terhubung secara seri dengan semua elemen. Untuk ini beroperasi, bahan bakar, udara dan tekanan uap dapat dikonversikan ke sinyal listrik dengan cara bellow, tabung Bourdon, atau switch merkuri diafragma dioperasikan