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shirin
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Join Date: Jan 2009
Posts: 5

Reciprocating Compressors

01/31/2009 6:31 AM

Hello All,

Can anybody inform me about the difference between a single acting reciprocating compressor and a double acting one,please help by providing literature for the same as well.

Thanks and Regards,

Shirin Pathak

PUNE

MAHARASHTRA,INDIA
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sidevalveguru
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#1

Re: Reciprocating Compressors

01/31/2009 6:48 AM

Hello Shirin.

The benefit to multiple stage compressors is the abiliity to reduce the temperature of the air between stages.

At higher pressures, this would be quite high.

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shirin
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#4
In reply to #1

Re: Reciprocating Compressors

01/31/2009 7:14 AM

Thanks a lot for the valuable suggestion,

Regards,

Shirin.
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JohnDG
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#2

Re: Reciprocating Compressors

01/31/2009 7:01 AM

A single acting machine only uses one side of the cylinder for compression, so only one cylinderful of air is compressed per rotation of the crank.

A double acting machine uses both the forward stroke (compressing the air "in front of" the piston), and the return stroke (compressing the air "behind" the piston), so so compressing two cylinderfuls of air per crank rotation.

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sidevalveguru
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#3
In reply to #2

Re: Reciprocating Compressors

01/31/2009 7:05 AM

I believe the question referred to '2-stage', meaning two separate cylinders; a HP & a LP. Also of swept volumes proportional to pressures.

My apologies if i read this wrongly.

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ozzb
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#6
In reply to #3

Re: Reciprocating Compressors

01/31/2009 8:04 AM

Question was asked as acting not stages.

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sidevalveguru
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#7
In reply to #6

Re: Reciprocating Compressors

01/31/2009 8:16 AM

True! Again, my apologies if i read between the lines too much.

The added complexity of the piston rod packing, & the cross-head are best absorbed in the largest sizes.

That's also where i'd start looking @ 'screw type compressors'.

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shirin
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#5
In reply to #2

Re: Reciprocating Compressors

01/31/2009 7:16 AM

Thanks a lot to all three of you for the valuable suggestion,

Regards,

Shirin.
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