990.34wika隔膜密封
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德国wika隔膜 990.34 螺纹连接式隔膜密封 焊接结构
 990.34德国wika隔膜密封的应用
适用于腐蚀性、受污染或高温压力介质
化学加工工业
石化行业
水处理
 990.34德国wika隔膜密封的功能特性
全焊接结构
多种材料可选
适合高压应用
 990.34德国wika隔膜密封的描述
压力范围和膜片直径
*大压力范围 (Mb) 取决于膜片有效直径和工作温度（*大+50℃）
Mb 22 mm：0 ... 100 MPa
Mb 29 mm：0 ... 60 MPa
Mb 40 mm：0 ... 40 MPa
Mb 52 mm：0 ... 16 MPa
亦可参见数据手册上的“膜片压力-温度额定值”
过程连接件
螺纹G ½ B（外螺纹）和G ¼ B（外螺纹），符合EN 837-1标准，不带定位凸台
螺纹G ½、G ¼（内螺纹）
螺纹 ½ NPT、¼ NPT（外螺纹）
螺纹½ NPT、¼ NPT（内螺纹）
其他连接件按要求提供

 990.34主要参数
Pressure range
(see pressure-temperature
diagrams from page 4)
0 ... 0.6 bar [0 ... 8.7 psi] to 0 ... 1,000 bar [0 ... 14,500 psi]
other units (e.g. psi, kPa) as well as all equivalent vacuum or combined pressure and vacuum ranges
are available.
Level of cleanliness
of wetted parts
■ Oil and grease free per ASTM G93-03 level F WIKA standard (< 1,000 mg/m2)
■ Oil and grease free per ASTM G93-03 level D and ISO 15001 (< 220 mg/m2)
Origin of wetted parts ■ International
■ EU, CH, USA
Connection to the measuring
instrument
■ Axial gauge adapter
■ Axial gauge adapter with female thread G ½, G ¼, ½ NPT or ¼ NPT
■ Male thread 9/16-18 UNF
Type of mounting ■ Direct mounting
■ Capillary
■ Cooling element
Flushing connection ■ Without
■ Single flushing connection (G ¼, G ⅛, ¼ NPT, ⅛ NPT)
■ Dual flushing connection (G ¼, G ⅛, ¼ NPT, ⅛ NPT)
■ Plug screws
Design per NACE ■ Without
■ MR 0175
■ MR 0103
Vacuum service (see IN 00.25) ■ Basic service
■ Premium service
■ Advanced service
Instrument mounting bracket
(only for versions with capillary)
■ Without
■ Form H per DIN 16281, 100 mm, aluminium, black
■ Form H per DIN 16281, 100 mm, stainless steel
■ Bracket for pipe mounting, for pipe outer Ø 20 ... 80 mm, steel (see data sheet AC 09.07)