Take Our Survey Contact Us LinkedIn Twitter YouTube Channel

MS4 / MSP4 Series - Aseptic Single Seat Valves

Product Type:
Valves / Diaphragm Valves
Diaphragm valve with innovative fan support.

We Are Here to Help

Find your local representatives within your region for product inquiries.
Where to Buy

The SPX FLOW MS4 and MSP4 aseptic single seat valves are designed for aseptic applications in the food, beverage, dairy, pharmaceutical and chemical industries. The valves are available in shut-off or change-over design as well as for manifold or tank outlet applications.


  • Innovative fan support mechanism extending the operating pressure range and the lifetime of the diaphragm
  • Flat easily cleanable single layer diaphragm design enabling immediate leakage detection
  • Suitable for process pressures of up to 145 psi (10 bar), depending on size
  • High temperature capability
  • A variety of valve body configurations enables efficient system designs
  • Easy and cost effective maintenance compared with bellows provides low cost of ownership
  • 3-A approved
  • MSP4 available with USP Class VI approved diaphragm and diaphragm shaft material
  • ATEX compliant models

Product-wetted metal parts are made of AISI 316L / 1.4404 (DIN EN 100888) grade material. Available seat seal materials are EPDM, HNBR, FPM or VMQ. The diaphragm (MS4) and diaphragm shaft (MSP4) are made of PTFE-TFM 1705 (FDA21CFR177.2600).

Available in DN 25 DN 100, 1" 4".

Valve variants:

  • Single seat valves MS4, MSP4 (with diaphragm shaft made of PTFE), AMSR4 (with regulating cone)
  • Tank outlet valves: MST4, MSTP4 (with diaphragm shaft made of PTFE)
  • Change-over valves: MSES4

Conversion kits for existing DELTA M4/MP4 as well as DELTA M3 valves enable leveraging the features and advantages of the corresponding APV DELTA MS4/MSP4 valve.

DELTA MS4 Aseptic Single Seat Valve Maintenance Video
斯必克流体(SPX FLOW)旗下APV品牌DELTA MS4无菌膜片单座阀的维护保养
DELTA MS4 & MSP4 Aseptic Single Seat Valves ID-8022 US GB
Valve Key ID-8047 GB
Aseptic Single Seat Valves - FB-0036 US
MS4 Diaphragm Valve with Fan Support User Manual GB DE DK ES FR
MS4 Diaphragm Valve with Diaphragm Support ATEX User Manual GB DE DK