Emerson ASCO Service Manual

513

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1

ASCO™ Spool Valves

single/dual solenoid (mono/bistable function) - pilot operated or air operated
aluminium body - “NAMUR” style - 1/4 and 1/2 tapped

Features

• The monostable spool valves in conformity with IEC 61508 Standard (2010 route 2H version )

have TÜV (551 series) and EXIDA (551-553 series) certied with integrity levels: SIL 2 for
HFT = 0 / SIL 3 for HFT = 1

• The spool valves have threaded port connections and "NAMUR" style interface

• The same spool valve can be adapted for 3/2 NC or 5/2 functions for controlling double-

acting and single-acting actuators

•

All the exhaust ports of the spool valve are connectable, providing better environmental

protection. Particularly recommended for sensitive areas, such as clean rooms, and

applications in the pharmaceutical and food processing sectors

•

The valves offer environmental protection against the ingress of liquids, dusts or other

foreign matter (environmentally-protected construction)

•

Epoxy moulded coil for general service applications

•

The solenoid valves satisfy all relevant EU Directives

General

Differential pressure 2 - 10,4 bar [1 bar =100 kPa]
Flow (Qv at 6 bar) 1/4 = 700 l/min (ANR)

1/2 = 3000 l/min (5/2, 5/3)

fluids ()

air, inert gas, ltered

temperature range (TS)

-25°C to +60°C

seal materials ()

NBR (nitrile) + PUR (polyurethane)

3/2 NC - 5/2 - 5/3

SERIES

551 - 553

Materials in contact with fluid

() Ensure that the compatibility of the fluids in contact with the materials is verified

Body, end cover Aluminium, black anodized
End cover (spring return) Glass bre lled PA
Interface plates Glass bre lled PA
Spool valve internal parts

Zamak, stainless steel, POM, aluminium

Seals NBR + PUR
Core tube Brass
Core and plugnut Stainless steel
Shading coil Copper

Air operated specifications

pipe

size

()

orifice

size

(mm) (m3/h) (l/min) -

flow

coefficient

Kv

3/2 NC - 5/2 - Air pilot operated - spring return (monostable)

1/4 6 0,75 12,5 2 10 - 551A101
1/2 13 3,15 52,5 2 10 - 553A101

3/2 NC - 5/2 - Air pilot operated and return (bistable)

1/4 6 0,75 12,5 2 10 - 551A102
1/2 13 3,15 52,5 2 10 - 553A102

operating pressure

differential (bar)

max. (PS)

min..

air ()

prefix

optional

basic

catalogue

number

Pilot operated specifications

operating pressure

differential (bar)

max. (PS)

min.

air ()

~ = ~/=

power level

pipe

size

()

orifice

size

flow

coefficient

Kv

(mm) (m3/h) (l/min)

3/2 NC - 5/2 - Solenoid air pilot operated - spring return (monostable)

1/4 6 0,6 10 2 10 10

1/2 13 2,49 41,5 2 10 10

 Select 8 for NPT ANSI 1.20.3 or select G for ISO G (228/1) ● Available feature - Not available

(1)

Certied IEC 61508 Functional Safety data, use sufx "SL".

(2)

UL CSA

RP ­BP
RP - -

RP-BP -

BP

prefix optional solenoids

NEMA ATEX / IECEx

7 & 9 Ex e mb Ex mb

(2)

WBLP PV SC

EF

l

l

- - - 553G001

l l l

l

- - - 553G001

2

3

3/2 NC - 5/2 function

5/3 function

(1)

(1)

RP

LP

Not

available 2,5W - 4W

Low

power

POWER LEVELS - cold electrical holding values (watt)

Reduced

power

IP65

-

l

l

551A001

- X551A001 20787
553A001

4

5

1

BP

MP

Not

available 5W - 6,9W

Medium

power

Basic

power

basic

catalogue

number

(1)

(1)

(1)

(1)

(1)

80108GB-2019/R04

Visit our website at www.emerson.com/asco 1

3/2 NC - 5/2 - 5/3
SERIES
551 - 553

Pilot operated specifications

pipe

size

()

orifice

size

(mm) (m3/h) (l/min)

flow

coefficient

Kv

3/2 NC - 5/2 - Solenoid air pilot operated and return (bistable)

1/4 6 0,6 10 2 10 10

1/2 13 2,49 41,5 2 10 10

5/3 - W1 - pressure held, solenoid air pilot operated and return

1/4 6 0,6 10 2 10 10

1/2 13 2,49 41,5 2 10 10 RP-BP -

5/3 - W3 - pressure release, solenoid air pilot operated and return

1/4 6 0,6 10 2 10 10

1/2 13 2,49 41,5 2 10 10 RP-BP -



 Select 8 for NPT ANSI 1.20.3 or select G for ISO G (228/1) ● Available feature - Not available

(1)

UL CSA

operating pressure

differential (bar)

max. (PS)

min.

air ()

~ = ~/=

power level

RP-BP -

NEMA ATEX / IECEx

RP ­BP
RP - -

BP

RP ­RP - -

RP ­RP - -

7 & 9 Ex e mb Ex mb

EF

prefix optional solenoids

(1)

WBLP PV SC

l

l

l

- - - 551G002

l l l

- - - 553G002

l

l l l

l

l l l

-

l

-

l

-

l

basic

IP65

l

- X551A002 20787

l

- X551A065 20787

l

- X551A066 20787

catalogue

number

551A002

553A002

551A065



553A065

551A066

553A066

80108GB-2019/R04

Visit our website at www.emerson.com/asco2

3/2 NC - 5/2 - 5/3

SERIES

551 - 553

Prefix table

prex

1 2 3 4 5 6 7 LP RP MP BP
E F

E F H T
E F H T L
E F L

J B E F
J B E F M F
J C E F
J C E F H T

P V

W B L P

S C

Explosionproof - NEMA 7, 9 - Zinc plated steel conduit
(18” continuous leads)

EF (18” continuous leads) + high temperature
EF + high temperature + 72" continuous leads
EF + 72" continuous leads
EF + Junction box (conduit in 1/2" NPT)
EF + Junction box (conduit in 1/2" NPT) + surge suppression coils
EF + Junction box (conduit in 3/4" NPT)
EF + Junction box (conduit in 3/4" NPT) + high temperature
Encapsulated epoxy moulded (EN/IEC 60079-18)*

I.S./encapsulation with PBT IP67 enclosure (EN/IEC 60079-7, -18, -31)*
Solenoid with spade plug connector (EN/IEC 60730)

X

Other special constructions

description

power level

- - -

- - -

- - -

- - -

- - -

- - -

- - -

- - -

-

l

-

l

-

l

-

l

-

- -

-

-

Suffix table

sufx

1 2 3 4 5 LP RP MP BP

G D

M S

S L

Non-electrical, 2 GD, construction safety, gas/dust (EN ISO 80079-36/37)
Screw type manual operator

Certied IEC 61508 Functional Safety data

description

(1)

power level

- - - -

-

-

-

l

-

l

Product selection guide

STEP 1

Select basic catalogue number, including
pipe thread indentication letter. Refer

l

to the specications table on page: 1

l

or 2

l

Example: G551A001

l

STEP 2

l

Select prex (combination). Refer to the

l

specications table and the prex table,

l

respect the indicated power level.

l

Air operated version, does not use prex.

l

Example: SC

l

STEP 3

l

Select sufx (combination) if required.
Refer to the sufx table, respect the
indicated power level.
GD sufx available for air operated ver­sion only (do not use manual operator
sufx).

l

Example: MS

l

STEP 4
Select voltage. Refer to standard voltages
on page: 4

Example: 230V / 50Hz

STEP 5

Final catalogue / ordering number

Example:
SCG551A001MS 230 V / 50 Hz

Options & Accessories

series

551 1/8 34600418
551

(+ W1/W3)
553 1/2 34600479
551/553 M5 - - 34600484

lAvailable feature

-Not available
* ATEX/IECEx valves using these solenoids are approved according to

EN ISO 80079-36 (2016) and EN ISO 80079-37 (2016) [non electrical]

(1)

Not to use with MS sufx

(2)

Provided with "SL" sufx

pipe

size

1/4 34600419

exhaust protector

(stainless steel)

(G) (NPT) (M)

(2)

34600482

(2)

34600483

(2)

34600481

(2)

(2)

(2)

-

-

-

Ordering examples valves:

WBLP G 551 A 001 MS 24V / DC

(2)

prex

pipe thread

basic number

SC G 551 A 001 MS 230V/ 50 Hz
SC G 551 A 001 MMS 230V / 50 Hz

PV X8 551 A 002 20787 115V / 50 Hz

G 553 A 102
G 551 A 102 GD
G 551 A 101 GD SL

SC G 551 A 001 SL 230V / 50 Hz

voltage

sufx

80108GB-2019/R04

Visit our website at www.emerson.com/asco 3