ARI-STEVI®BBD 415 (DN25 – 50)

Blow down valve – straight through with flanges and pneumatic actuator

Description

eClass-No.:	37010201
Application:	Selection criteria: boiler blow down Application: steam boiler engineering
Medium:	Cooling water, cooling brine, warm water, hot water, steam, gas, etc.

ARI-STEVI®BBD 415 (DN25 – 50)
Pneumatic actuator
• Required air supply pressure max. 6 bar
• Options:
– Assembly of additional devices
– Lever

Operating principles

The steam trap is controlled by a swivel-mounted ball float (Pos. 24.16).
An integral bimetallic element (Pos. 24.6) provides automatic starting ventilation in the cold state.
At temperatures less than 90°C, the bi-metallic element holds the discharge orifice open, allowing air and other gasses to escape. At 90°C the bi-metallic element is fully closed and discharge is controlled only by the float mechanism (Pos. 24.16).
At the higher temperatures, air is automatically evacuated (Pos. 24.12), ejector style, with the condensate.
If the amount of condensate decreases or if there is no condensate, the ball float (Pos. 24.16) faces and locks the valve ball (Pos. 24.4) on the seat (Pos. 24.1). If the steam trap is acted upon only by vapour, the condensate-flooded seat (Pos. 24.1) remains shut.
The valve ball (Pos. 24.4) also works with the seat (Pos. 24.1) as a non-return valve.

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).

35.415

PN40

1.0619+N

DN 25 – 50

Other materials and versions on request.

Stem sealing
Fig. 415	standard

	I. PTFE-V-ring unit -10°C to 240°C

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	200°C	250°C	300°C	350°C	400°C	450°C
1.0619+N	PN40	(bar)	40	38,1	35	32	28	25,7	23,8	13,1

DN		25	32	40	50
Seat-Ø	(mm)	22	27	37	47
Travel	(mm)	8	7	10	13

Kvs-value
standard	(m³/h)	6,4	6,4	14,7	14,7

Face-to-face dimension FTF series 1 according to DIN EN 558
L	(mm)	160	180	200	230

Flanges acc. to DIN EN 1092-1/-2			Flange holes / -thickness tolerances acc. to DIN 2533/2544/2545
Ø D	PN40	(mm)	115	140	150	165
Ø K		(mm)	85	100	110	125
n x Ø d1		(mm)	4 x 14	4 x 18	4 x 18	4 x 18