These tanks maintain system pressure below the relief setting of the relief valve. 这种膨胀罐将系统压力保持在安全阀设置的排放压力以下。
With the compressor clutch engaged, record the discharge air temperature and the compressor discharge pressure. 当压缩机离合器合上时，记录排放空气温度和压缩机排放压力。
Irrespective of disconnection of a fan, control of the exhaust steam pressure, must be maintained. 必须保持风机不被无端的断开，排气压力在控制之下。
Low table by adjusting the outlet pressure control screw. 低压表的出口压力可由调节螺杆控制。
Like the single-stage regulator, outlet pressure from the first stage of the two-stage regulator rises as cylinder pressure decreases. 同单级调整器一样，两级调整器的第一级的出口压力随钢瓶压力的降低而升高。
The dial records showed a very slight variation in pressure. 刻度盘显示出压力有极微小的变化。
