Helpful Guidelines for Pulse Diaphragm Valve Operation
                     Helpful Guidelines for Pulse 
Diaphragm Valve Operation
Presnted By: -  Abhinav Shasht r i
Index
SR.No Title Slide No
1 Introduction 3
2 1. Measure the Operation 4
Time to Faulted Condition
3 2. Working Time is 5
Important
4 3. Product Design 7
5 4. Know the B10 value 8
6 5. Monitoring 9
Introduction:-
In industrial environments, pneumatic lines can pose significant hazards to workers and 
associated equipment both the lines themselves and the moving components they operate.
We are going with the most important dust collector part called Pulse Diaphragm Valve. It is 
responsible for the continuous flow of air and collects dust in a bag filter. Its unique springless 
design provides fast opening and closing of the Pulse Valve with the saving of compressed air. 
Long life, High flow, and fast diaphragm operation produce reliable and economical operation.
Systems have been developed to help minimize these hazards and to comply with two ISO 
safety standards (EN ISO 13849 and ISO 13118:2000), which mandate the dissipation of 
pneumatic energy to prevent unintended start-up or movement in a machine. Design engineers 
can utilize a pneumatic safety, such as Pulse Diaphragm Valve into an air preparation system 
to comply with these standards and increase levels of plant safety.
Maniks pulse diaphragm valves are operated by integral solenoid pilot operator. When the 
valve is energized, the trapped air above the pulse valve diaphragm is quickly exhausted 
causing the fast opening of main diaphragm valve. When the pilot-operated valve is de-
energized, air escapes through the bleed hole of main pulse valve to balance the diaphragm 
pressure and instantly closes the valve.
Several important points should be considered when specifying a pulse diaphragm valve:
1. Measure the Operation Time to Faulted Condition
Take the time to understand the worst-case 
scenario as when safety of pulse diaphragm valve 
is in faulted condition, standard exhaust times 
(assuming normal stop) do not apply. 
In this situation there is a failure in the valve or 
control system and the exhaust flow may be 
restricted, thereby increasing exhaust time.
2. Working Time is Important
The faster a machine can stop, the closer to the machine 
that the guards, light curtains or other presence-sensing 
devices can be installed. 
The Working off impacts your calculations for safe 
stopping distance and your switching time on impacts the 
lag time to fill the machine.
http://www.maniks.com/manufacturer/dust-collector-parts-manufacturer/

3. Product Design
Adopting a safety of pulse diaphragm valve with a series-parallel flow 
design means benefiting from the best of both series and parallel 
arrangements, ensuring that both valve elements (redundant design) must 
shift to supply air downstream. If particular valve element has to be out of 
position with the other, then the downstream air will be dumped to 
exhaust in parallel.
This arrangement allows for higher exhaust flow capability and ensures 
very low residual pressure during a fault, eliminating the danger of 
residual energy making its way into the machine. Consequently, if two 
pulse diaphragm valves are used in series, the air supply to the first valve 
flows through to the second and then downstream. When in exhaust 
mode, this design flows most of the exhaust through the second valve 
creating a lag in exhaust time.
4. Know the B10 value
The valve’s B10 value is its life expectancy in switching cycles and 
is based on B10 testing (the point at which 10% of a sample has 
failed). It’s an important consideration when determining the 
MTTFd. 
The higher the quality of the components is, the longer the B10 life 
of the machine into which they are built will be. This is an 
important consideration for Category 4 applications where a high 
diagnostic coverage is needed.
 
5. Monitoring
To achieve the highest level of diagnostic coverage, it’s critical to employ all the best 
aspects of safety circuit architecture - redundancy (dual-channel circuits) and 
monitoring to detect faults or failures in control systems and check for short circuit 
faults. The measuring portion of the safety system must check to see if both sides of 
the valve are shifting together every time. This is generally done with most versions 
of safety relays and safety PLCs that can also perform pulse test monitoring.
These types of safety relays and safety PLCs make for very reliable systems with 
high diagnostic coverage – especially short circuit faults in dual channel systems. 
The use of sophisticated controls and monitoring ensuring the valve is functional.
Safety allows no room for error. If the risk assessment requires a safety rating of PLc 
or higher for the pneumatic system, then a dual redundant safety exhaust valve offers 
a simple-to-implement and cost-effective way to attain the required safety level.
http://www.maniks.com