A pilot-operated valve installed in discharge piping that maintains positive pressure in the suction piping, while monitoring pressure in the suction piping through a sensing line. 吸水限流阀:安装在出水管上用来维持吸水管内正压的先导操作阀,同时通过读出线测吸水管内压力。 3.3.67.3 Pressure Control ...
••••••规范和标准(NFPA20)消防泵种类驱动方式消防泵控制柜系统组成、部件和附件安装和设计 2 A-CFirePumpSystems 消防泵 •为消防喷淋系统，消火栓或者消防水带输出稳定的流量和扬程的水泵•通过第三方检测机构认证，并专门用于消防应用的水泵•符合美国消防协会规范（NFPA20）的要求 3 A-CFire...
A-CFirePumpSystemsJuly22,2018Rick15000686105Agenda目录•规范和标准(NFPA20)•消防泵种类•驱动方式•消防泵控制柜•系统组成、部件和附件•安装和设计2A-CFir..
2010 Edition 20–4 INSTALLATION OF STATIONARY PUMPS FOR FIRE PROTECTION Contents Chapter 1 Administration 20– 6 4.30 Pressure Actuated Controller Pressure 1.1 Scope 20– 6 Sensing Lines. 20– 21 1.2 Purpose 20– 6 4.31 Break Tanks 20– 21 1.3 Application 20– 6 4.32 Field Acceptance Test of...
check valve. A sensing line connected to the suction piping controls the position of the throttling valve. When the suction pressure drops to a preset throttling pressure (typically 20 psi), the valve begins to close thereby limiting flow and maintaining the suction pressure to the preset level....
1 DS DS/EN 12621 + A1-2010 2010-06-14 English Machinery for the supply and circulation of coating materials under pressure - Safety requirements 2 DS DS/EN 12288-2010 2010-06-14 English Industrial valves - Copper alloy gate valves 3 DS DS/EN ISO 11953-2010 2010-06-14 English Dentistry...
NFPA 72H-19 National Fire Alarm Code - 2019 Handbook 国外标准规范.pdf,National Fire Alarm and Signaling Code® Handbook Ninth Edition Edited by Richard J. Roux Senior Electrical Specialist, NFPA Barry D. Chase Senior Fire Alarm Engineer, NFPA Christoph
A pilot-operated valve installed in discharge piping that maintains positive pressure in the suction piping, while monitoring pressure in the suction piping through a sensing line. 吸水限流阀:安装在出水管上用来维持吸水管内正压的先导操作阀,同时通过读出线测吸水管内压力。 3.3.67.3 Pressure Control ...