ARI-STEVI® Pro 453

Feedwater control valve – 3-way with flanges – with pump spill back

Description

eClass-No.:	37010203
Application:	Selection criteria: simple control task, non-critical operating conditions, standard requirements Application: industrial complex, building technology,mechanical engineering
Medium:	Cooling water, cooling brine, warm water, hot water, steam, gas, etc.

Features

• Compact design
• Precision guided stem
• Burnished stem
• Tapered seat ring
• 2 screwed seatrings
• Reducible kvs-values
• Rangeability 30 : 1
• Post guided plug
• EPDM sealing
• Travel indicator

Technical data

Figure

Nominal pressure

Material

Nominal diameter

Information / restriction of technical rules need to be observed! A production permission acc. to TRB 801 No. 45 is available.

The engineer, designing a system or a plant, is responsible for the selection of the correct valve.

Resistance and fitness must be verified, contact manufacturer for information (refer to Product overview and Resistance list).

35.453

PN40

1.0619+N

DN25 – 100

Other materials and versions on request.

Pressure-temperature-ratings

Intermediate values for max. permissible operational pressures can be determined by linear interpolation of the given temperature / pressure chart.

acc. to manufacturers standard	-10°C to 120°C	150°C	180°C
1.0619+N PN40 (bar)	40	38,1	36,2

Operation

The feedwater control valve regulates the flow of feedwater to the steam boiler.

It is controlled by a level controller. The target of the control is to keep the level in the boiler constant. The feedwater control valve is normally built into the feed water pressure line. If the water level drops in the boiler, the electrical actuator PREMIO-Plus 2G adjustes a perforated plug in the valve. If the water level in the boiler rises, the perforated plug closes the seat.

Once the feed water amount to the boiler falls below a certain amount, a further perforated plug opens the bypass valve. It ensures that the minimum amount, required for cooling and lubrication of the feed water pump, is always available.

Necessary data for sizing

Medium: Feed water

Temperature: …………………… [°C]

Inlet pressure: …………………… [bar(g)] (Pump pressure )

After-pressure: …………………… [bar(g)] (Boiler pressure)

Boiler capacity: …………………… [t/h]

Pump delivery rate: …………………… [m³/h]

Recirculation flowrat: …………………… [m³/h]

Actuator PREMIO-Plus 2G:

Voltage: ……………………

Options: ……………………

Closing pressures refer to page 5.

100

Fig. 453	2,2 kN	H	(mm)	563	589	595	593	—	—	—
	2,2 kN	PN40	(kg)	14	18	22	25	—	—	—
	5 kN	H	(mm)	563	589	595	593	629	645	664
	5 kN	PN40	(kg)	15	19	22	25	34	45	63
	12 kN	H	(mm)	737	763	769	767	803	819	838
	12 kN	PN40	(kg)	20	23	27	30	39	49	68
	15 kN	H	(mm)	—	—	—	—	803	819	838
	15 kN	PN40	(kg)	—	—	—	—	39	49	68

DN				25					32				40				50
Straight through	Kvs-value		(m³/h)	1	1,6	2,5	4	6,3	2,5	4	6,3	10	4	6,3	10	16	6,3	10	16	25
	Seat-Ø A		(mm)	27					27			31	27		31	41	27	31	41	51
Bypass	Kvs-value		(m³/h)	0,1	0,16	0,25	0,40	0,63	0,25;	0,4	0,63	1,0	0,4	0,63	1,0	1,6	0,63	1,0	1,6	2,5
	Seat-Ø B		(mm)	8					8				8			13	8		13
max. differential pressure ¹⁾			(bar)	40					40				40				40
Travel			(mm)	20					20				20				20
2,2 kN	Closing pressure	I.	(bar)	15,4					15,4			11,6	15,4		11,6	6,4	15,4	11,6	6,4	4
	Operating time		(s)	53					53				53				53
	Operating speed ²⁾		(mm/s)	0,38
5 kN	Closing pressure	I.	(bar)	38,5					38,5			29,2	38,5		29,2	16,6	38,5	29,2	16,6	10,6
	Operating time		(s)	53					53				53				53
	Operating speed		(mm/s)	0,38
12 kN	Closing pressure	I.	(bar)	40					40				40				40			27,2
	Operating time		(s)	53					53				53				53
	Operating speed		(mm/s)	0,38

DN				65				80				100
Straight through	Kvs-value		(m³/h)	10	16	25	40	16	25	40	63	25	40	63	100
	Seat-Ø A		(mm)	41	41	51	66	41	51	66	81	51	66	81	101
Bypass	Kvs-value		(m³/h)	1,0	1,6	2,5	4	1,6	2,5	4,0	6,3	2,5	4,0	6,3	10
	Seat-Ø B		(mm)	25				25				25
max. differential pressure ¹⁾			(bar)	40				40				40
Travel			(mm)	30				30				30
5 kN	Closing pressure	I.	(bar)	16,5	16,5	10,5	6,2	16,5	10,5	6,2	4	10,5	6,2	4	2,5
	Operating time		(s)	79				79				79
	Operating speed		(mm/s)	0,38
12 kN	Closing pressure	I.	(bar)	40	40	27,1	16,1	40	27,1	16,1	10,6	27,1	16,1	10,6	6,8
	Operating time		(s)	79				79				79
	Operating speed		(mm/s)	0,38
15 kN	Closing pressure	I.	(bar)	40	40	34,3	20,4	40	34,3	20,4	13,4	34,3	20,4	13,4	8,6
	Operating time		(s)	79				79				79
	Operating speed		(mm/s)	0,38
Further operating speeds: refer to data sheet ARI-PREMIO / PREMIO-Plus 2G