The most advanced design for the utmost reliability

Designed and manufactured to meet the most demanding requirements of industrial refrigeration and energy recovery, this compressor offers high perfomance and reliability with low operating and maintenance costs. Suitable for operation with all refrigerants, available in 4 models: 4, 6, 8 and 12 cylinders.

Built with decades of refrigeration compressor producing know-how this hight capacity and energy efficient machine has met the test of time through experience of a full range of applications in thousands of installations the world over.

Extremely robust, low noise level even at the highest speeds of rotation, incomparable simplicity of construction and maintenance, all of which constitute the best guarantee for maximum reliability of your plant.

Double Oil Separation
The traditional separators have been replaced with our double oil separation system, providing a more rapid and economic installation with reduced maintenance.

The oil consumption is negligible under 0.025 gr/HP/h.

Cooling System
Designed to operate with all refrigerants at the most severe pressure and temperature conditions, the machine is preset for an effective head cooling by water circulation, thus also keeping at lower level the working temperature with consequent longer life of valves.

The oil cooling, when required, is carried out by an external water cooled oil cooler.

Lubricating Circuit
Oil pump arranged for both directions of rotation: double filtering system; full flow oil circulation through the crankshaft and the shaft seal box, for efficient heat removal.

Minimum load start and capacity control

Standard steps of factory installed capacity reduction with hydraulically actuated cylinder unloading (unloaded start device supplied on request).

Standard Capacity Control Steps Single Stage.

The position 0% is used for the unloaded start.

Cyl. No.	Percent of full Load
4	100	50	0
6	100	66	33	0
8	100	75	50	25	0
12	100	66	33	0

Acceptance Tests
All the compressors are hydraulically and pneumatically tested.

Before shipment, the compressors, complete with the ordered accessories, are final-tested for 24 hours.

Test certificates, according to the Standards of International Classifi-cation Boards, are furnished upon request for all models.

Operatevg Conditions
All the Series PMI 125 X 90 compressors operate at a maximum speed of 1500 rpm, with application range up to a differential pressure value of 14 kg/cm2.

Maintenance
The exceptionally easy accessibility of all internal parts, together with the simplicity of compressor design, permits a rapid and thus economic maintenance.

Technical Data

Bore: 125mm Stroke: 90mm Cylinders: 4, 6, 8 & 12 Speed: 700 to 1500 rpm.

Single Stage Reciprocating Compressors

Model	Swept Vol. M3/h	Befrigeration Capacity and Absorbed Power				Dimensions mm.
		NH3		R22
		Kcal/h	BkW	Kcal/h	BkW	A	B	C
PMI 125 X 90 - 4	390	160900	60.9	148800	61.0	900	850	685
PMI 125 X 90 - 6	585	243750	92.3	225400	95.5	945	850	765
PMI 125 X 90 - 8	780	321750	122.7	297500	123.0	1.350	850	685
PMI 125 X 90 - 12	1.170	482600	184.6	446300	185.0	1.440	850	1.035

Single Stage Reciprocating Compressors

Model	Swept Vol. M3/h		Befrigeration Capacity and Absorbed Power				Dimensions mm.
			NH3		R22
	LP	HP	Kcal/h	BkW	Kcal/h	BkW	A	B	C
PBI 90 - 6 - ID	388.6	139.2	45200	36.5	48300	42.0	1.045	820	905
PBI 90 - 6 - IS	388.6	139.2	51800	37.4	61500	44.1	1.045	820	985
PBI 90 - 8 - ID	583.6	139.2	61000	50.5	67500	57.1	1.460	850	925
PBI 90 - 8 - IS	583.6	139.2	70800	50.8	80600	57.8	1.460	850	925
PBI 90 - 12 - ID	777.2	278.2	90400	73.0	96600	84.0	1.470	850	1.035
PBI 90 - 12 - IS	777.2	278.2	103600	74.8	123000	88.2	1.520	850	1.035

ID: Integrated Intermediate Gas Desuperheating System.

IS: Integrated Intermediate Gas Desuperheating with Liquid Subcooling

Swept volume and capacity ratings are based on the following conditions:
speed 1470 rpm; for the single stage t_ss, - 10° C, t_sd + 40°C; and two stage t_ss 40° C.', t_sd + 40°C;