S300超压切断阀（OPSS）安装在一段调压器前或后（请参见安装图），在超压时保护管线设备，尤其是聚乙烯管线。有内取压和外取压两种形式。当压力超过预设值时，触发机构动作，阀门关闭切断气体供给。需手动复位。S300适用于天然气、液化石油气和城市煤气，可任意方向安装
SPARES KITS
Spares kit contents are marked on parts list opposite
SPARES KIT CODE DESCRIPTION
SK3006-01 S300 OPSS Low Pressure
SK3006-02 S300 OPSS High Pressure
HIGH PRESSURE OVER-PRESSURE SLAM-SHUT SPRINGS
Bar PSIG Part Number Colour Code
0.5 - 1.0 7.25 - 14.5 J12506-311 DARK BLUE / BLACK
1.0 - 2.0 14.5 - 29.0 J12506-312 DARK BLUE / ORANGE
2.0 - 4.0 29.0 - 58.0 J12506-313 DARK BLUE / RED
LOW PRESSURE OVER-PRESSURE SLAM-SHUT SPRINGS
mbar “wc Part Number Colour Code
18 - 60 7.5 - 24 J12506-281 BLACK
50 - 80 20 - 32 J12506-282 ORANGE
60 - 110 24 - 44 J12506-283 RED
100 - 210 40 - 84 J12506-284 DARK GREEN
200 - 350 3 - 5 PSI J12506-287 YELLOW
280 - 500 4 - 7 PSI J12506-288 WHITE
