MAXON - Bơm dầu trong nước LO

Bơm dầu trong nước LO

Các đơn vị bơm dầu "LO" là các đơn vị nhỏ gọn, được gắn trên khung, với tất cả các bộ phận cần thiết để cung cấp dầu chưng cất được lọc từ bể cấp liệu cho một hoặc nhiều hệ thống đầu đốt. Chúng bao gồm một bơm chuyển động tích cực, tự mồi, bơm được chứng nhận bởi UL với phốt trục cơ khí và van xả an toàn tích hợp.

Các đơn vị bơm dầu "LO" có sẵn trong 3 kích cỡ lên đến 600 GPH # 2 của dầu nhiên liệu # 2 (FOD) và áp suất xả lên tới 130 PSIG. 

Model “LO” LIGHT OIL SUPPLY UNITS                                Page 9403

Capacity/Selection Data

Performance date for each of the three available Light Oil Supply Unit sizes is shown in Table 1 below. As reflected in the data provided, general usage calls for a pump set capable of delivering twice the maxi-mum rated burner capacity being supplied. This allows for some recirculation and permits BPRV (back pressure relief valve) to do its job of maintaining supply system pressure. It also allows for some future system expansion.

Operation on 50HZ power will result in approxi-mately a 20% drop in flow.

Discharge loop data indicates a range of back pressure relief valve settings over which the normal capacity can be supplied by the pump set. Higher flows are possible at anything less than maximum listed pressure.

"Head" data indicates the maximum pressure obtainable expressed as equivalent feet of oil. The maximum pressure available at a combustion systems is always reduced by the difference in elevation between burner and pump.

Pressure drop data shown in based on an allow-ance for partial clogging of the suction filter. With proper maintenance, actual drop will be somewhat less. All table data is based on performance with 50 SSU #2 oil of .845 specific gravity.

Table 1: Performance Data (60 Hz operation)

Model No.		LO-90	LO-180	LO-600
Nominal	gal/min	.75	1.20	5.00
Burner
	gal/hr	45	90	300
Capacity
(Max)	kBTU/hr	6300	12,600	42,000
Discharge	Psig	25-130	45-130	60-130
Loop	Head	350	350	350
ÆP Suction	Psig	1	1.5	1.5
Valve to Pump	Ft of Oil	2.5	4	4.5
Average	Suction	1.6	1.8	2.1
Velocity
	Discharge	2.5	3.2	3.7
(ft/sec) at
Connections	Return	2.5	3.2	3.7

Pressure drops for various pipe sizes at maximum suggested burner capacity for each Light Oil Supply Unit are shown in Table 2. Data is given in Psi/100 ft run and is based on .845 sp.gr. oil of the viscosity shown.

Table 2: Pipe Sizing Guide (Psi/100 ft)

Max. Capacity	Pipe Size		Viscosity (SSU)
(gpm)	(")	32		50		100
	3/8	2.8		4.3		11.9
1-1/2	1/2	1.1		1.7		4.7
	3/4	0.3		0.6		1.5
	1/2	3.8		6.3		8.1
3	3/4	0.9		0.9		2.8
	1	0.3		0.4		1.0
	1	2.6		3.8		4.0
10	1-1/4	0.7		1.1		1.4
	1-1/2	0.3		0.5		0.7

Conversion factors between various measure-ment units (based on sea level equivalent of 14.7 psig

=  29.92" Hg = 33.9 ft water = 39.89 ft of .845 sp.gr. oil) are given in Table 3. To use, multiply "known" quantity (from left of table) by the factor shown under "desired" units.

Table 3: Conversion Factors

	TO	PSIG	" Hg	Ft. H2O	FT. OIL
FROM
One Psig =		1	2.04	2.31	2.71
One " Hg =		0.49	1	1.13	1.33
One Ft. H20 =		0.43	0.88	1	1.18
One Ft. Oil =		0.37	0.75	0.85	1

11/99

Page 9404                                                             Model “LO” LIGHT OIL SUPPLY UNITS

Duplex Arrangement

For the ultimate in system dependability, or where shutdown due to pump failure would be serious, two Model "LO" Light Oil Supply Units may be in-stalled in the duplex arrangement shown at right. Dotted lines indicate field piping.

Only one supply unit should be in operation at any given time. Changeover may be as simple as manual closing of inlet and discharge ball valves on damaged set, and opening of those valves on the "standby" unit, or the system can be adapted for automatic changeover.

We do recommend that units be used alternatively as main and standby, with the changeover occurring monthly, if not more often.

Dimensions (in inches +- .25)

SIZE	A	S	C	D (size)	E	F (size)	G	H (size)	J	K	L	M	N	P
LO-90	24.00	20.00	16.00	1/2	15.00	3/8	19.00	3/8	23.00	6.38	6.38	14.00	5.00	5.00
LO-180	24.00	20.00	15.38	3/4	13.94	1/2	18.94	1/2	23.44	6.38	6.38	14.00	5.00	5.00
LO-600	29.00	22.75	25.25	1-1/4	15.44	1	22.19	1	28.12	7.88	7.88	20.00	6.25	6.25

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