ARI-STEVI® Pro 470 / 471 – ANSI (DN25-200)

Control valve – straight through with shaft guided plug

Description

eClass-No.:	37010203
Application:	Selection criteria: complex control task, critical operating conditions, specific requirements Application: process technology, (heavy-) industrial complex, plant construction, chemical industry, power plant technology
Medium:	Steam, condensate, gases with liquid components, etc.

Scope of applications
Valves are used for „controlling the flow of liquids, gases and vapours in chemical and other processing plants and for plant engineering“.

The information complies to the Pressure Equipment Directive 2014/68/EU.
It is the responsibility of the machine planner to ensure compliance.
The special markings on the valve must be taken into account.
Refer to the catalogue sheet to see which materials are used in standard versions.
Please contact the supplier or the manufacturer if you have any questions.

Operating principles

The control valves are especially suitable for actuation by pneumatic or electrical actuators.
The plug type depends on the application. For information on the plug type, refer to the order confirmation, the nameplate or the data sheet. The flow direction is indicated by an arrow on the valve body.
The medium flows through the plug against the closing direction as standard. In certain applications the medium may need to flow in the closing direction, in which case additional forces are produced.
The actuator design should take account of this.

Technical data

Figure	Version	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).
32.470….90	with flanges	ANSI150	SA216WCB	DN 25-200 / NPS 1″-8″
32.471….90	with flanges	ANSI150	SA216WCB	DN 25-200 / NPS 1″-8″
35.470….90	with flanges	ANSI300	SA216WCB	DN 25-200 / NPS 1″-8″
35.470….4….90	with butt weld ends	ANSI300	SA216WCB	DN 25-150 / NPS 1″-6″
35.471….90	with flanges	ANSI300 (restricted pressure)	SA216WCB	DN 25-200 / NPS 1″-8″
35.471….4….90	with butt weld ends	ANSI300 (restricted pressure)	SA216WCB	DN 25-150 / NPS 1″-6″
55.470….90	with flanges	ANSI300	SA351CF8M	DN 25-150 / NPS 1″-6″
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 ANSI B16.5				-29°C to 38°C ¹⁾	50°C	100°C	150°C	200°C	250°C	300°C	350°C	400°C	425°C
Fig. 470 / 471	SA216WCB	ANSI150	(bar)	19,6	19,2	17,7	15,8	13,8	12,1	10,2	8,4	6,5	5,5
Fig. 470	SA216WCB	ANSI300	(bar)	51,1	50,1	46,6	45,1	43,8	41,9	39,8	37,6	34,7	28,8
Fig. 470	SA351CF8M	ANSI300	(bar)	49,6	48,1	42,2	38,5	35,7	33,4	31,6	30,9	29,4	29,1