Aseptic Sanitary Diaphragm Valves | Shut-off Valves | MS4 / MSP4 Series | Manufacturer | SPX FLOW

MS4 / MSP4 Series - Aseptic Single Seat Valves

Product Type(s): Aseptic Valves

The MS4 and MSP4 aseptic single seat valve series are designed for applications in the food, beverage, dairy, pharmaceutical and chemical industries. These valves are available in shut-off, change over, and tank outlet configurations.

MSP4 Diaphragm Valve

Key Advantages

Innovative fan support mechanism improves pressure range and diaphragm life
Flat, single-layer diaphragm design simplifies cleaning and ensures rapid leakage detection
Supports process pressures up to 145 psi (10 bar), depending on valve size
High temperature resilience for demanding applications
Multiple valve body configurations enable optimal system integration
Cost-effective maintenance compared to bellows-based designs
Certified to 3-A sanitary standards
MSP4 variant includes USP Class VI approved diaphragm and shaft materials
Available in ATEX-compliant models for hazardous environments

Actuator Warranty & Reliability

The actuator supplied with this valve is covered by a 5-year actuator warranty, or up to 1 million actuations, whichever comes first. Built with fully welded, sealed, maintenance-free construction, it eliminates internal servicing and reduces wear components to deliver long-term durability in demanding hygienic processing environments.

Key benefits include:

Maintenance-free operation with no internal servicing
Fewer spare parts and improved total cost of ownership
uptime and production continuity

Key Applications

Food & Beverage Processing
Dairy Processing
Pharmaceutical Processing
Chemical Processing

Sizes: 1" - 4" DN25 - DN100 Housing Configurations:

MS4: MS4: MS41 (L), MS42 (T), MSE41 (KLL), MSES45 (LLS), MST42 (T)
MSP4: MSP4: MSP41 (L), MSP42 (T), MSPT42 (T)

Sterilization Temperature (approx. 20 min.):

EPDM 302ºF (150ºC)
HNBR 284ºF (140ºC)

Control Air Pressure: Min. 87 psi (6 bar), max. 116 psi (8 bar) Product Wetted Parts: AISI 316 L (1.4404), AISI 304 (1.4304) Seal Material:

Seat seal: EPDM, HNBR, FPM
Diaphragm and Diaphragm shaft MSP: TFM

Options

Valve configurations: Single seat valves:

DELTA MS4
DELTA MSP4 (with diaphragm shaft made of PTFE)
DELTA MSR4 (with regulating cone)

Tank outlet valves:

DELTA MST4
DELTA MSTP4 (with diaphragm shaft made of PTFE)

Change over valves:

DELTA MSES4

Performance

Pressure Ratings:

Operating Pressure: Maximum line pressure: 145 psi (10 bar)

Temperature Ratings:

Operating temperature: Maximum 275ºF (135°C), Short time 284ºF (140ºC) - no steam