Primet 的波纹管阀为了防止螺丝构造的芯柱免遭腐蚀，采用完全阻隔外部空气的构造，不让媒介的接液部分接触外部气体。
小型的PSBV系列阀体是由SUS316L制成，流出口的直径有4.5mm~12mm种类齐全。另外，大型的PLBV系列是锻造波纹管阀，流出口尺寸有8mm~20mm种类齐全，适用于高流量的用途。

Materials of Construction

No.	Part name	Qty	Materials
1	Handle Cover	1	Nylon
2	Stem Nut	1	St. St. 304
3	Locking Washer	1	St. St. 304
4	Handle	1	Nylon(Aluminium PLBV series)
5	Position Indicator	1	Nylon
6	Stem Locking Ring	1	St. St. 304
7	O-ring	1	Viton® (fluorocarbon KFM)
8	Actuator	1	St. St. 316L
9	Bonnet	1	St. St. 304
10	Bonnet Gasket	1	PCTFE(PTFE, PCTFE PLBV series)
11	Bellows	1	St. St. 316L
12	Stem	1	St. St. 316L
13	Disk	1	PCTFE / (PTFE PLBV series)
14	Body	1	St. St. 316L

Specifications & Tests

	PSBV系列	PLBV系列
Pressure Test	1.5 X Max work pressure	1.5 X Max work pressure
Helium Leak Test	＜7 X 10-10Pa.㎥/sec (7 X 10-9Atm cc/sec)	＜1 X 10-6Pa.㎥/sec (1 X 10-5Atm cc/sec)