Screw Compressor OSNA - OSNA5351-K (NH3)

Low temperature range, Economiser operation

OSK = Application for air-conditioning and medium temperature cooling

BITZER’s open screw compressors for use with NH₃ have been proving their worth on the market for many years. We offer these robust and efficient solutions for use on their own and in parallel operation with several compressors and a shared oil separator. The combination of open compressor and external standard motors makes the series exceptionally flexible and allows operation at different supply voltages. BITZER has the appropriate couplings and coupling housing as accessories in its portfolio, making it safe and easy to combine compressors with external standard motors. A significant improvement: the refrigerant circuit and electrical drive are separate, making maintenance and repair much simpler. To complement the open OS.A screw compressors, we’ve developed a complete portfolio of tried-and-tested accessories for use in large-scale commercial and industrial NH₃ refrigeration and air conditioning systems.

The OS.A95103 compressor marks the beginning of the new OS.95 series. The strengths of this new development include large volume flows up to 1,015 m³/h at 2,900 revolutions per minute, integrated control electronics, an optimised slider concept for seamlessly adjustable capacity control and Vi adjustment for maximum efficiency at every operating point.

High system output
Optimal capacity adjustment and minimal energy requirements under full- and part-load
Combination of various compressor sizes

Performance data
Technical data

Compressor type	Cond.temp.	Qo / Pe	Saturated suction temperature °C
Compressor type	[°C]	Qo / Pe	-10	-15	-20	-25	-30	-35	-40
OSNA5351-K	30	Qo	66900	54300	43600	34500	26800	20400	15050
	30	Pe	19,64	17,65	15,88	14,29	12,86	11,57	10,37
	40	Qo	61800	49950	39750	31150	23850	17720
	40	Pe	22,50	20,30	18,34	16,56	14,93	13,38
	50	Qo	56000	44850	35300	27200	20350
	50	Pe	25,20	22,90	20,80	18,84	16,92
	30	Qo	ECO		51100	41200	32600	25250	18940
	30	Pe			17,76	16,20	14,72	13,31	11,94
	40	Qo			48700	38850	30300	22900
	40	Pe			21,20	19,29	17,47	15,65
	50	Qo			45300	35550	27100
	50	Pe			24,70	22,40	20,10

Qo - Cooling capacity [Watt], Pe - Power consumption [kW]

Compressor type	Displacement with 2900 min-1	Displacement with 3500 min-1	Weight	Coupling type	Pipe connections				Capacity control	Direction of rotation	Coupling type
					DL		SL
					Discharge line		Suction line
	m3/h	m3/h	kg		mm	inch	mm	inch
OSNA5351-K	100	121	65	KS 620	42	1 5/8"	54	2 1/8"	100/75%	rechts clockwise	1450bis/to/à4500

Screw Compressors OSNA - OSNA5351-K (NH3)

Screw Compressor OSNA - OSNA5351-K (NH3)