ARI-STEVI® Pro 422 / 462 (DN200-250)

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:	Refrigerant, cooling water, warm water, hot water, thermal oil, steam, gas, 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.
Three plug types are available to suit the various applications:
parabolic plug (standard pattern)
perforated plug
pressure balanced plug

The flow through control valves is always against the closing direction.
In the case of control valves with perforated plugs, gases and vapours flow against the closing directions, but liquids flow through in the closing direction.
If a pneumatic actuator is to be used on a straight-way valve with a perforated plug with the fluid moving in the closing direction, a higher closing force will be needed.
This is to prevent vibration as the plug approaches the closed position.
If the forces generated by the actuators are too low, arrangements should be made to relieve the pressure as far as this is compatible with service conditions.

Technical data

Figure	Nominal pressure	Material	Nominal diameter	Information / restriction of technical rules need to be observed! ARI-Valves of EN-JL1040 are not allowed to be operated in systems acc. to TRD 110. A production permission acc. to TRB 801 No. 45 is available. (Acc. to TRB 801 No. 45 EN-JL1040 is not allowed.) 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).
12.422 / 12.462	PN16	EN-JL1040	DN200-250
22.422 / 22.462	PN16	EN-JS1049	DN200-250
34.422 / 34.462	PN25	1.0619+N	DN200-250
35.422 / 35.462	PN40	1.0619+N	DN200-250
Other materials and versions on request.

Stem sealing
Fig. 422	standard	optional

	II. PTFE-packing -10°C to 250°C	I. EPDM-sealing -10°C to 150°C (allowed for water and steam up to 180°C)	II. Pure graphite-packing -10°C to 450°C

Fig. 462

standard

optional

III. Stainless steel-bellow with pure graphite-packing

-60°C to 450°C

III. Stainless steel bellows seal with EPDM-sealing

-60°C to 150°C

(allowed for water and steam up to 180°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 DIN EN 1092-2			-60°C to <-10°C ¹⁾	-10°C to 120°C	150°C	200°C	250°C	300°C	350°C	400°C	450°C
EN-JL1040	PN16	(bar)	—	16	14,4	12,8	11,2	9,6	—	—	—
EN-JS1049	PN16	(bar)	on request	16	15,5	14,7	13,9	12,8	11,2	—	—

acc. to manufacturers standard			-60°C to <-10°C ¹⁾	-10°C to 120°C	150°C	200°C	250°C	300°C	350°C	400°C	450°C
1.0619+N	PN25	(bar)	18,7	25	23,9	22	20	17,2	16	14,8	8,2
1.0619+N	PN40	(bar)	30	40	38,1	35	32	28	25,7	23,8	13,1