ARI-PREDU®

Pressure reducing valve with diaphragm actuator

Description

eClass-No.:	37011101
Application:	Industrial installations, processing technology, plant manufacturing, etc.
Medium:	Steam, neutral gases, vapours and liquids, etc.

Features

• Compact design
• Construction without pillars
• Exact and easy adjustment
• Diameter independent ranges
• Simple change of spring and actuator
• 5 exchangeable actuator sizes
• 3 exchangeable spring sizes
• Pressure balanced by stainless steel bellow
• Spindle sealing via stainless steel bellow
• Tapered seat ring
• Screwed seat ring
• Kvs-values reduceable
• Flow divider for noise reduction (optional)
• Plug with PTFE soft seal (optional)

Technical data

Pressure regulating valve, straight through with diaphragm actuator DMA

ARI-PREDU® Pressure reducing valve with diaphragm actuator

Stainless steel – Actuator

Plug DN 15 – 32

Plug DN 40 – 150

Bellows seal DN 15 – 40

Figure	Nominal pressure	Material	Nominal diameter	Downstream-pressure ranges	Actuator
12.701	PN16	EN-JL1040	DN15-150	0,2 – 16 barg	DMA 400 DMA 250 DMA 160 DMA 80 DMA 40
22.701	PN16	EN-JS1049	DN15-150
23.701	PN25	EN-JS1049	DN15-150
34.701	PN25	1.0619+N	DN15-150
35.701	PN40	1.0619+N	DN15-150
62.701	PN16	1.4581	DN15-150
65.701	PN40	1.4581	DN15-150
Technical data of the actuator refer to page 6.

100

125

150

Kvs-value
Kvs-value	standard	(m³/h)	3,2	5	8	12,5	20	32	50	80	125	190	280
Kvs-value	reduced	(m³/h)	0,1 / 0,4 / 1 / 2,5	0,1 / 0,4 / 1 / 2,5 / 4	0,1 / 0,4 / 1 / 2,5 / 4 / 6,3	—	—	—	—	—	—	—	—
Seat-ø		(mm)	18	22	25	32	40	50	65	80	100	125	150
Travel		(mm)	4	5	6	8	8	10	11	13	16	19	22
Max. differential pressure drop		(bar)	40	40	25	25	25	25	20	20	20	16	16
Shutt off class			Leakage class I acc. to DIN EN 1349 or DIN EN 60534-4 ( ≤ 0,05% from Kvs-value)

Face-to-face dimension FTF series 1 according to DIN EN 558
L	(mm)	130	150	160	180	200	230	290	310	350	400	480

Flanges acc. to DIN EN 1092-1/-2 Flange holes / -thickness tolerances acc. to DIN 2533/2544/2545
ØD	PN16	(mm)	95	105	115	140	150	165	185	200	220	250	285
ØD	PN25 / 40	(mm)	95	105	115	140	150	165	185	200	235	270	300
ØK	PN16	(mm)	65	75	85	100	110	125	145	160	180	210	240
ØK	PN25 / 40	(mm)	65	75	85	100	110	125	145	160	190	220	250
n x Ød	PN16	(mm)	4 x 14	4 x 14	4 x 14	4 x 18	4 x 18	4 x 18	4 x 18	8 x 18	8 x 18	8 x 18	8 x 22
n x Ød	PN25 / 40	(mm)	4 x 14	4 x 14	4 x 14	4 x 18	4 x 18	4 x 18	8 x 18	8 x 18	8 x 22	8 x 26	8 x 26

Dimensions
H	DMA 400	(mm)	495	495	500	500	540	540	545	585	610	650	690
	DMA 250	(mm)	455	455	460	460	500	500	505	545	585	610	650
	DMA 160	(mm)	440	440	440	440	480	480	490	530	550	590	630
	DMA 80	(mm)	435	435	440	440	480	480	485	530	550	590	630
	DMA 40	(mm)	435	435	440	440	480	480	485	530	550	590	630

Weights
12.701 / 22./23.701 / 34./35.701 / 62./65.701	with DMA 400	(kg)	26	27	28	30	35	41	48	70	85	125	158
	with DMA 250	(kg)	21	22	23	25	30	36	43	65	83	123	156
	with DMA 160	(kg)	19	20	21	23	28	34	41	63	81	121	154
	with DMA 80	(kg)	18	19	20	22	27	33	40	62	80	120	153
	with DMA 40	(kg)	17	18	19	21	26	32	39	61	79	119	152

Downstream-pressure ranges
	(barg)	0,2 – 0,6	0,5 – 1,2	0,8 – 2,5	2 – 5	4,5 – 10	8 – 16
Pneumatic Actuator DMA	(cm²)	DMA 400	DMA 250	DMA 160	DMA 80	DMA 40
Pneumatic Actuator PN-max.	(barg)	1,6	2,5	6	10	20
Spring end-No.		04	04	07	07	07	10

100

125

150

Proportional ranges (Combination: actuator with valve in ± bar)
	DMA 400	0,2 – 0,6	0,05	0,05	0,05	0,05	0,05	0,06	0,07	0,08	0,08	0,10	0,15
	DMA 250	0,5 – 1,2	0,09	0,09	0,06	0,08	0,09	0,09	0,10	0,15	0,10	0,15	0,23
	DMA 160	0,8 – 2,5	0,15	0,20	0,15	0,20	0,20	0,25	0,25	0,30	0,35	0,40	0,50
	DMA 80	2,0 – 5,0	0,40	0,45	0,40	0,45	0,35	0,40	0,45	0,50	0,60	0,75	0,90
	DMA 40	4,5 – 10,0	0,55	0,55	0,60	0,65	0,70	0,75	0,80	0,85	0,90	1,20	1,35
	DMA 40	8,0 – 16,0	0,80	0,85	1,00	1,05	1,10	1,25	1,30	1,50	1,75	1,80	2,00
Pressure reducing valves are proportional regulators with permanent control deviation depending from the construction. The actual control deviation depends on the valve load. (Kv-value / Kvs-value-max) x Proportional range = Actual control deviation The values shown are preliminary values and may vary by the real plant

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*	-10°C to 120°C	150°C	200°C	250°C	300°C	350°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
EN-JS1049	PN25	(bar)	on request	25	24,3	23	21,8	20	17,5

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

acc. to DIN EN 1092-1			-60°C to <-10°C*	-10°C to 100°C	150°C	200°C	250°C	300°C	350°C
1.4581	PN16	(bar)	8	16	15,6	14,9	14,1	13,3	12,8
1.4581	PN40	(bar)	20	40	39,2	37,3	35,4	33,3	32,1

* Studs and nuts made of A4-70 (at temperatures below -10°C)

Application

The pressure regulating valve is a direct acting proportional regulator, self operated; which regulates a high inlet pressure to a smaller downstream pressure. The downstream pressure is regulated, this means the valve closes when the downstream pressure rises.

Operating fields are to regulate fluids of the group II acc. to Pressure Equipment Directive 2014/68/EU, e.g. steam, neutral gases, vapours and liquids. With steam and liquids, having temperatures higher than the allowable working temperatures a water seal pot must be installed in the control line (to protect actuator diaphragm) (refer to page 6).

Installation in the control line can be seen in the system drawing:

ARI-PREDU® Pressure reducing valve with diaphragm actuator

Sizing
For the calculation you have the program myValve (Program part „Pressure reducing valves“). After giving in the process data, the Fig.-No. and size is recommended out of the
integrated data bank. The diameter of the piping in front and behind of the pressure regulating valve can also be calculated with the max. allowable flow velocities with myValve.
The necessary downstream pressure gives the needed pressure range. Because the regulation tolerance at the end of the range is smaller, the smaller range must be used, in case of a range overlapping.
For example: Downstream pressure 2,4 bar(g), choose actuator range 0,8 – 2,5 bar(g), although 2-5 bar(g) could be used.
The safety valve used to secure the downstream pressure must have an adequate distance between set pressure and downstream pressure.
The max. possible capacity of the pressure reducing valve is used to select the safety valve at it’s set pressure.
The max. possible capacity has to be calculated with p1 (= max. possible inlet pressure),
p2 (= set pressure of the safety valve) and the Kvs-value of the pressure reducing valve with myValve. With this found capacity you can, with myValve (Program part: Safety
valves), select the safety valve, and with the pressure reducing valves and other valves, administer them under a project.
Important: If not secured that the bypass valve has a larger capacity than the pressure reducing valve, or that it can be open parallel, then the extra capacity must be considered for the safety valve sizing