Pneumatic Soft Start Valves

A pneumatic soft-start valve enables downstream pressure to slowly increase back into a pneumatic system. Soft start valves can prevent cylinders, actuators and other pneumatic equipment from being irreversibly damaged. RS Components offer a range of high-quality valves from leading brands including SMC, Festo and Legris.

Why are pneumatic soft start valves important?

Industrial pneumatic systems are often complex and depending on the application they can have varying numbers of air cylinders and other air actuators all running at different times and speeds. If maintenance or repair is needed all compressed air must be completely exhausted from machinery, airlines, air valves and air cylinders. This is essential for engineers to work safely.

The industrial pneumatic air mains supply is pressurized to 100psi and above. It is essential that this high-pressure air is not opened fully straight away. If air at full volume and pressure was introduced straight away it could have disastrous and costly results.

How does a pneumatic soft-start valve work?

Soft start valves work by opening the airflow slowly, gradually allowing a low flow of compressed air into the complete system. This ensures that the various actuators are brought up to full operating pressure slowly and safely. When all equipment is up to a threshold line pressure the soft-start valve will open fully allowing full compressed air back into the system for machines to work properly.

Our soft start valves are available in selection specifications including body materials, flow rates, threaded inlet port sizes and pressure ratings to suit a range of pneumatic control and automation applications.


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Description Price Manufacturer Series Type Flow Rate Supply Inlet Port Outlet Tube Size Minimum Operating Pressure Supply Inlet Port Thread Gender Maximum Operating Pressure Supply Inlet Port Thread Standard Supply Inlet Port Thread Size Body Material Standards Met
RS Stock No. 907-6609
Mfr. Part No.AV4000-04-5DZ-Q
BrandSMC
SGD275.68
Each
units
AV4000 - - - - 0.2MPa - 1 MPa - - ADC -
RS Stock No. 885-2240
Mfr. Part No.EAV2000-F02-5DZ-Q
BrandSMC
SGD262.26
Each
units
AV2000 - - G 1/4 Female - 0.2MPa Female 1 (Operating) MPa, 1.5 (Proof) MPa G - Aluminium Die Cast -
RS Stock No. 724-655
Mfr. Part No.7870 08 13
BrandLegris
SGD102.00
Each
units
7870 Control Valve - G 1/4 Male 8mm 1bar Male 10 bar G 1/4 in - -
RS Stock No. 202-3251
Mfr. Part No.MS6-SV-1/2-D-10V24-2M8-SO-AG
BrandFesto
SGD1,137.76
Each
units
MS Exhaust Valve 4300L/min - - - - 10bar - - - -
RS Stock No. 873-2626
Mfr. Part No.EAV4000-F04-4YO-Q
BrandSMC
SGD279.23
Each
units
AV4000 Control Valve - G 1/2 Female - 0.2MPa Female 1 (Operating) MPa, 1.5 (Proof) MPa G 1/2in ADC TUV
RS Stock No. 202-3210
Mfr. Part No.MS6-SV-1/2-D-10V24-2M8
BrandFesto
SGD1,004.53
Each
units
MS Exhaust Valve 4300L/min G 1/2 Female - - Female 10bar G 1/2in - -
RS Stock No. 196-4543
Mfr. Part No.AV2000-F02-5DZ-Q
BrandSMC
SGD254.66
Each
units
AV2000 - - G 1/4 Female - 0.2MPa Female 1 MPa G 1/4in ADC -
RS Stock No. 724-649
Mfr. Part No.7860 08 13
BrandLegris
SGD107.20
Each
units
7860 System Isolator - G 1/4 Male 8mm 1bar Male 10 bar G 1/4 in - -
RS Stock No. 873-2512
Mfr. Part No.EAV4000-F04-5DZ-Q
BrandSMC
SGD286.50
Each
units
AV4000 Control Valve - G 1/2 Female - 0.2MPa Female 1 (Operating) MPa, 1.5 (Proof) MPa G 1/2in ADC TUV
RS Stock No. 203-0321
Mfr. Part No.VABF-S6-1-P5A4-G12-4-1-P
BrandFesto
SGD638.94
Each
units
VABF Soft-Start Valve - - - - - - - - Aluminium -
RS Stock No. 203-0284
Mfr. Part No.VABF-S6-1-P5A4-G12-4-1
BrandFesto
SGD544.78
Each
units
VABF Soft-Start Valve - - - - - - - - Aluminium -
RS Stock No. 907-6605
Mfr. Part No.AV2000-02-5DZ-Q
BrandSMC
SGD251.04
Each
units
AV2000 Control Valve - R 1/4 Female - 0.2MPa Female 1 MPa, 1.5 (Proof) MPa R 1/4in Die Cast Aluminium CE, EC Directive, TUV
RS Stock No. 196-4544
Mfr. Part No.AV3000-03-5DZ-Q
BrandSMC
SGD261.72
Each
units
AV3000 - - G 3/8 Female - 0.2MPa Female 1 MPa G 3/8in ADC -
RS Stock No. 202-3193
Mfr. Part No.MS6-SV-1/2-D-10V24-2OE-SO-AG
BrandFesto
SGD1,125.77
Each
units
MS Exhaust Valve 4300L/min G 1/2 Female - - Female 10bar G 1/2in - -
RS Stock No. 202-3168
Mfr. Part No.MS6-SV-1/2-E-10V24-SO-AG
BrandFesto
SGD1,780.98
Each
units
MS Exhaust Valve 4300L/min G 1/2 Female - - Female 10bar G 1/2in - -
RS Stock No. 202-3219
Mfr. Part No.MS6-SV-1/2-E-10V24-AG
BrandFesto
SGD1,680.45
Each
units
MS Exhaust Valve 4300L/min G 1/2 Female - - Female 10bar G 1/2in - -
RS Stock No. 202-3218
Mfr. Part No.MS6-SV-1/2-D-10V24P-2M12-SO-AG
BrandFesto
SGD1,143.49
Each
units
MS Exhaust Valve 4300L/min G 1/2 Female - - Female 10bar G 1/2in - -
RS Stock No. 202-3166
Mfr. Part No.MS6-SV-1/2-E-10V24-AD1
BrandFesto
SGD1,969.12
Each
units
MS - 4300L/min G 1/2 Female - - Female 10bar G 1/2in - -
RS Stock No. 202-3224
Mfr. Part No.MS9-SV-G-C-V24-S-VS
BrandFesto
SGD1,084.06
Each
units
MS - 8, 300 to 16, 550L/min G 1/4 Female - - Female 16bar G 1/4in - -