Festo

FESTO MS-EM Series Manual Shut-Off Valves

Festo MS Series Manual Shut-Off Valves
Efficient, reliable, and built for safety — the Festo MS Series Manual Shut-Off Valves provide secure isolation of compressed air systems during maintenance, machine setup, or emergency shutdowns. These manually operated 3/2-way valves are designed to vent downstream pressure safely while preventing accidental reactivation.

  • Manual Operation: Easy, intuitive lever or knob actuation for quick shutoff or venting.

  • 3/2-Way Function: Simultaneous shutoff and exhaust functionality enhances safety during service or changeover.

  • Modular Compatibility: Seamlessly integrates into MS Series air preparation units.

  • Multiple Sizes & Thread Types: Available in G-thread or NPT connections in widths from 40 mm to 124 mm.

  • Exhaust Management: Options for muffler or ducted exhaust via port 3 for noise control and air redirection.

  • Durable Construction: Engineered with long-lasting materials to withstand industrial environments.

Part Number
Model
Thread Type
Width (mm)
541258
MS4-EM1-1/4
G1/4
40
MS4-EM1-1/4-S
G1/4
40
MS4-EM1-1/4-S-Z
G1/4
40
541261
MS4-EM1-1/4-Z
G1/4
40
MS4-EM1-1/8
G1/8
40
MS4-EM1-1/8-S
G1/8
40
Part Number
Model
Thread Type
Width (mm)
541267
MS6-EM1-1/2
G1/2
62
MS6-EM1-1/2-S
G1/2
62
MS6-EM1-1/2-S-Z
G1/2
62
541270
MS6-EM1-1/2-Z
G1/2
62
MS6-EM1-1/4-S
G1/4
62
Part Number
Model
Thread Type
Width (mm)
MS4N-EM1-1/4
NPT 1/4
40
541281
MS4N-EM1-1/4-S
NPT 1/4
40
MS4N-EM1-1/4-S-Z
NPT 1/4
40
MS4N-EM1-1/4-Z
NPT 1/4
40
MS4N-EM1-1/8
NPT 1/8
40
MS4N-EM1-1/8-S
NPT 1/8
40
MS4N-EM1-1/8-S-Z
NPT 1/8
40
Part Number
Model
Thread Type
Width (mm)
541267
MS6-EM1-1/2
G1/2
62
MS6-EM1-1/2-S
G1/2
62
MS6-EM1-1/2-S-Z
G1/2
62
541270
MS6-EM1-1/2-Z
G1/2
62
MS6-EM1-1/4-S
G1/4
62
Part Number
Model
Thread Type
Width (mm)
MS9-EM
G1
90
MS9-EM-G-S-VS
G1
90
Part Number
Model
Thread Type
Width (mm)
MS12-EM
G1
124
MS12-EM-G
G1
124
Part Number
Model
Thread Type
Width (mm)
535036
MS12N-EM
NPT 1
124