| 摘要 |
<p>The present invention makes it possible for a flow rate to be controlled to be switched easily by means of an orifice being changed conveniently without disassembling or assembling a pressure type flow rate control apparatus. An orifice changeable pressure type flow rate control apparatus of the present invention is so constituted that a valve body (23) of a control valve (2) for a pressure type flow rate control apparatus (A) is installed between an inlet side fitting block (39) provided with a coupling part of a fluid supply pipe and an outlet side fitting block (43) provided with a coupling part of a fluid takeout pipe; a fluid inlet side of the valve body (23) and the afore-mentioned inlet side fitting block (39), and also a fluid outlet side of the afore-mentioned valve body (23) and the afore-mentioned outlet side fitting block (43) are detachably and hermitically connected, respectively, so that a flow passage for gases through the afore-mentioned control valve (2) is formed; and, a gasket type orifice (38) for a pressure type flow rate control apparatus (A) is removably inserted between a gasket type orifice insertion hole (42c) provided on the outlet side of the afore-mentioned valve body (23) and a gasket type orifice insertion hole (43b) of the outlet side fitting block (43b).</p> |
