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ASCO SCG551A001MS | 551 Series 5/2 Solenoid Valve 1/4" NPT, 24V DC, Spring Return, Namur Mount

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ASCO SCG551A001MS | 551 Series 5/2 Solenoid Valve 1/4" NPT, 24V DC, Spring Return, Namur Mount

Grote Afbeelding : ASCO SCG551A001MS | 551 Series 5/2 Solenoid Valve 1/4" NPT, 24V DC, Spring Return, Namur Mount Beste prijs

Productdetails:

Plaats van herkomst:	SG
Merknaam:	ASCO
Certificering:	ATEX
Modelnummer:	SCG551A001MS
Document:	ACH-AB-P+F-E+H-IFM-ASCO-YOK...WA.pdf

Betalen & Verzenden Algemene voorwaarden:

Min. bestelaantal:	1
Prijs:	Bespreekbaar
Verpakking Details:	Karton
Levertijd:	Bespreekbaar
Betalingscondities:	T/T,XT,ALIPAY
Levering vermogen:	100 stuks per maand

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ASCO 551 Series solenoid valve 24V DC

1/4 NPT solenoid valve spring return

Namur mount solenoid valve with warranty

ASCO SCG551A001MS | 551 Series 5/2 Solenoid Valve 1/4" NPT, 24V DC, Spring Return, Namur Mount

ASCO SCG551A001MS 551 series 5/2 or 3/2 way solenoid valve — 1/4" NPT ports, Namur interface, spring return (monostable), 24 V DC, 3–10 bar. For piloting pneumatic actuators & cylinders.

Product Overview

The ASCO SCG551A001MS (commonly referenced as SCG551A001MS, Numatics/ASCO 551 Series) is a 4-way (5/2 or 3/2 convertible) solenoid pilot valve with a Namur direct-mounting interface for controlling single-acting or double-acting pneumatic actuators. It features 1/4" NPT ports (or G1/4" in metric regions — Suffix MS typically denotes Metric/G threads or special seal material; base 551A001 = 1/4" NPT), spring return (monostable / single solenoid), and is supplied for 24 V DC (8 W coil, Class F) operation. The valve is convertible between 5/2 (double-acting cylinder pilot) and 3/2 (single-acting cylinder / normally closed) by rotating the exhaust blanking plugs. Body is anodized aluminum; seals are NBR (Buna-N) standard. Suitable for piloting process valves, air cylinders, and clamping devices in general industrial automation.

Technical Specifications (Valve & Flow)

Parameter	Specification
Model / Order Code	SCG551A001MS (ASCO Numatics 551 Series — Monostable, Namur, 24 V DC)
Series	ASCO / Numatics 551 — Sub-base / Namur Mountable 4/2–5/2–3/2 Spool Valve
Function	5/2 Way (Double Solenoid convertible to 3/2 NC) — spool type
Actuation	Single Solenoid, Spring Return (Monostable) — de-energize → spool returns to home position
Port Size	1/4" NPT Female (base ports — P, A, B, R, S); Exhaust ports R/S can be plugged for 3/2 use
Nominal Flow (Cv / qₙ)	Cv ≈ 1.2 (≈ 700 L/min ANR @ ΔP 1 bar)
Orifice Size	6 mm (typical for 551 series spool)
Media	Filtered Compressed Air (40 µm prefilter recommended), lubricated or non-lubricated
Operating Pressure Range	3 … 10 bar (0.3 … 1.0 MPa / 45 … 145 psig) — pilot pressure must be ≥ 3 bar
Pilot Pressure (Min.)	Same as operating pressure (self-piloted from P-port)

Technical Specifications (Electrical & Mechanical)

Parameter	Specification
Solenoid Voltage / Power	24 V DC, 8 W (Hot — Class F insulated coil) — 100 % ED (continuous duty)
Response Time (Typical)	≤ 30 ms (energize), ≤ 40 ms (de-energize) @ 6 bar
Manual Override	Lockable push-button (press to shift; twist to latch — for commissioning/test)
Seal Material	NBR (Buna-N / Nitrile) — standard; FKM optional on -V suffix variants
Body / Spool Material	Anodized Aluminum Alloy / Hardened Aluminum Spool
Mounting Interface	Namur VDI/VDE 3845 (ISO 5599-2 mini Namur pattern) — direct mount on actuator or sub-base
Ambient Temperature	-20 … +50 °C (NBR seals / DC coil)
Electrical Connection	DIN 43650 Form A (ISO 4400) 3-pin plug with LED + surge suppressor (often ordered separately: 238714-006)
Weight (Approx.)	0.45 kg
Certifications	CE, cULus (File SA5835), RoHS compliant (newer production)

Key Features

Namur Direct-Mount Capable: Bolts directly onto the pilot port of a pneumatic actuator — eliminates tubing between valve and actuator for single solenoid 5/2 or 3/2 applications.
Convertible 5/2 ↔ 3/2: Rotate exhaust blanking plugs / re-arrange port labeling — one valve covers both double-acting (5/2) and single-acting spring-return (3/2 NC) pilots.
Spring Return (Monostable): Fails to safe position on loss of power / air — important for safety-related actuator fail-close/fail-open logic.
Manual Override with Lock: Allows bench-test and commissioning without energizing coil; lockable to prevent accidental operation.
Interchangeable with Competitors: Dimensionally compatible with Festo MN1H / SMC VQC / Norgren 8400 series Namur-mount spool valves in same envelope.

Typical Applications

Pneumatic Actuator Pilot: Single solenoid 5/2 pilot for double-acting process/quarter-turn valve actuators; 3/2 NC pilot for spring-return actuators.
Air Cylinder Directional Control: Small-bore cylinder control where Namur-mount simplifies panel layout.
Clamping / Fixture Air Circuits: Start/stop air to vacuum cups, toggle clamps, and grippers.
OEM Packaging / Converting Machinery: Compact pilot valve for integrated manifold or actuator-direct-mount.

551 Series typical option decode: 551 = Series | A = Single solenoid spring return, Namur mount, NPT ports | 001 = 24 V DC 8 W coil, NBR seals, DIN plug (no plug shipped) | MS = Often denotes Metric/G thread variant or special packaging — verify against ASCO cross-reference if G1/4 required. For double solenoid (no spring return / bistable) see 551B… ; for 110/230 V AC coil see -Axxx suffix variants. DIN 43650 connector with LED+spike suppression (e.g. ASCO 238714-006 or generic Hirschmann / Binder) ordered separately.

ASCO SCG551A001MS | 551 Series 5/2 Solenoid Valve 1/4" NPT, 24V DC, Spring Return, Namur Mount 0

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About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

Frequently Ask & Questions

Are preferential prices available?

Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.

Are the Products Genuine OEM Units?

Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.

How will you arrange shipment?

We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.

What is the warranty of goods?

One-year Warranty.

How long is the logistics cycle of the product?

Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.

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