BEST ENERGY EQUIPMENT (TIANJIN) COMPANY LIMITED

SSV-A400Safety Shut-off Valve

Applicable for offtake stations in gas transmission and distribution system, for gas supply to industrial and power pants.

Safety device for gas pressure regulating stations

Suitable for natural gas and all other non corrosive gaseous media

Characteristics 3D

Features

※Low pressure drop due to in-line flow design

※Replace internal parts without dismantling the valve from the line

※Equipped with pressure compensating valve

※Emergency manual release local position indicator standard

※Electric release and electric remote indication of valve position available

※High response accuracy and short response time

※Max. flow rate should not exceed 80 m/sec, noise <80dB

※TUV SIL3 certificate according to SIL-norm IEC 61508 IEC 61511

Technical Data

Function and Strength	EN14382
Nominal Pressure	CLass150~900 (2.0MPa~15MPa)
Nominal Size	DN25~DN400(NPS 1” ~NPS 16”)
Connections	Flanged ANSI B16.5 RF/RTJ
Temperature Class	-29℃~60℃, -46℃~60℃
Accuracy Class	±1%(AG1), ±2.5%(AG2.5), ±5%(AG5)
Response Time	s~1s
Explosion-proof/Protection Class	Up to ExdIIBT4, IP65
Materials	Main valve body: Cast steel A 216 WCB、A 352 LCC Pilot : Cast steel, forged steel, forged aluminum Internal part: Stainless steel, steel, copper, aluminum Spring: Spring steel （X750，A276，316） Sealing: Reinforced PTFE, NBR, synthetic rubber

Operating principle

Safety shut-off valve is controlled by pilot . Overpressure or underpressure release feature is when monitored downstream operating pressure exceeds set-point range, the pressure signal fed back to the pilot (pilot valve), the pilot piston moving up or moving down, so that the trolley trip, hammer down the impact of the firing pin and firing pin moves down makes disengage the hook and flap, flap valve is closed down, thereby cutting off gas to the downstream pipeline, protect downstream equipment and pipeline safety.