| 1. | All needle valves must be closed on test kit
检测组件上的所有针形阀必须关闭。 |
| 2. | Needle valves have nps / internal pipe threaded ends
针形阀配置nps内管螺纹连接端口。 |
| 3. | Before starting test , all needle valves on test kit must be closed
在开始检测前，检测组件上的所有针形阀都必须关闭。 |
| 4. | Bar - stock needle valve
杆控针形阀 |
| 5. | Needle valves are intended for use in applications that require precise metering control
针形阀适用于要求精确控制的应用场合。 |
| 6. | Angle needle valve
弯角针形阀 |
| 7. | Open needle valve " a " high side and vent needle valve to vent air from bypass hose
开启针形阀“ a ”高端和排气针形阀，从旁路软管排放空气。 |
| 8. | Connect bypass hose between vent needle valve and loosely connect to test cock no . 1
在排气针形阀上连接旁路软管，并将其松散连接到测试旋塞1号上。 |
| 9. | Needle valves shall have predictable flow patterns with ( 8 ) molded in increments on the body
针形阀应该在阀体上具有8个增量模式的可预测流量标记。 |
| 10. | Install a needle valve in the control line . if uneven pressure should cause the regulator to pulsate , its action can be stabilized by throttling the valve
在控制管线上安装一个针形阀。如果不稳定的压力导致调节阀波动，则这种波动通过对阀门节流将稳定下来。 |
