Emerson PS3 Selection, Preferred types, Customer specific types, Switching points, Alco Controls

			PS3				Alco Controls
		Pressure Switch
D	A	T	A	S	H	E	E	T
Selection

1. Preferred types

Type	PCN	Fixed setting		Reset	Max. temperature		Leakage	Pressure
		(bar)					test	connection
						pressure	pressure
		Cut-out	Cut-in		ambient	connection	(bar)
High Pressure Controls
PS3-A6S	0 715 603	16,0	11,0					7/16"-20 UNF
PS3-A6S	0 715 604	19,0	15,0	Auto	+ 70°C	+ 150°C	48	female thread with
PS3-A6S	0 715 600	26,5	22,5					Schrader opener
Low Pressure Controls / Pressure Limiter for low pressure protection PSL EN 12263
PS3-W1S	0 714 760	-0,3	1,2					7/16"-20 UNF
PS3-W1S	0 714 761	0,3	1,8	Auto	+ 70°C	+ 70°C	30	female thread with
PS3-W1S	0 714 762	2,0	3,5					Schrader opener
Pressure Limiter for high pressure protection PSH with snubber for direct compressor mounting EN 12263
PS3-W6S	0 715 831	14,0	10,0
PS3-W6S	0 715 556	21,0	16,0					7/16"-20 UNF
PS3-W6S	0 715 555	25,0	20,0	Auto	+ 70°C	+ 150°C	48	female thread with
PS3-W6S	0 715 567	29,0	23,0					Schrader opener
PS3-W6S	0 715 550	33,5	27,5					and snubber
PS3-W6S	0 715 553	40,0	33,0
Pressure Cut Out for high pressure protection PZH with snubber for direct compressor mounting EN 12263
PS3-B6S	0 715 568	19,2
PS3-B6S	0 715 564	22,7	appr.	external				7/16"-20 UNF
PS3-B6S	0 715 563	27,3	5 bar	manual	+ 70°C	+ 150°C	48	female thread with
PS3-B6S	0 715 569	29,5	below	reset				Schrader opener
PS3-B6S	0 715 560	36,0	cut-out					and snubber

Delivery: small quantities, single package without plug (Cables with plug must be ordered separately, see page 8)

2.Customer specific types

Minimum batch size: 100 pieces

Switching points

The differential of factory set switch points can be adjusted within the limits given in the charts on page 4 to 6. Use the recommended lower switch point line in working envelope for optimum results.

Example:

Step 1: Select your desired upper switch point P1. Draw a horizontal line to cross the upper switch point line.

Step 2: Draw a vertical line from this intersection point.

Step 3: Select your desired switch point between P2 and P4.

Notes:

1.Specify always upper and lower switching points for pressure switch with automatic reset function.

2.Specify only cut-out switching point for pressure switch with manual reset function.

3.For versions with micro-switch only one switching point can be adjusted while the second switching point is determined by the fixed differential of the micro-switch (see Pressure Ranges on page 2).

			Example
40
pressure											Upper switching point
(bar)
30											max. lower..
P1											recommended lower ...
P2											min. lower...
P320											... switching point
P4
10
0
0	1	2	3	4	5	6	7	8	9	10	11

4.Specify such devices with one switching point as the significant point and the other one as non-significant by putting the latter in brackets, e.g. PS3-AJS 2.0/(1.8)

PS3__35003_EN_R08.doc 3 / 10 09.08.2011