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SystemStak Check Valve, NFPA-D03 Size, Check in P, Free Flow towards Work Port, 36.0 PSI Cracking Pressure

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Description & Features

Designed for efficient hydraulic systems, the Eaton Vickers SystemStak Check Valve provides reliable performance in NFPA-D03 applications. This check valve features a cracking pressure of 36.0 PSI, ensuring optimal flow control. Constructed from durable ductile iron and hardened steel, it withstands a maximum operating pressure of 4500 PSI, making it suitable for demanding environments. The valve's space-saving design simplifies installation and reduces potential leak points, while its rugged construction accommodates high pressure and flow rates.

Engineered with a focus on functionality, the valve allows free flow towards the work port and prevents reverse flow, enhancing system efficiency. It operates effectively within a fluid temperature range of -4°F to 176°F for petroleum oils, ensuring versatility across various industrial applications. Standard Viton® seals and aluminum nameplates provide additional durability and longevity, making this valve a robust choice for hydraulic applications.

SKU: 02-138605

Supplier Part Number (MPN): 02-138605

Alternate Part Numbers: C1JL49, DGMDC3YPM41

Specifications

Actuator Type
Pressure Operated
Body Material
Iron
Check Location
Line P
Design Series
41 Series
Dimensions
3.46 in L x 1.87 in W x 1.57 in H
Direction of Flow
Towards Actuator
Domestic/Import
Domestic
Key
A
Material Standard
ANSI B93.7M-D03
Media
Petroleum Oil
Mounting Type
Manifold, Subplate
Nominal Size
#03
Performance
Standard
Seal Material
FKM
Segment Code
B
Series
DGMDC-3 Series
Sg Available Functions
Relief, Counterbalance, Sequence, Pressure Reducing, Direct Check, Pilot-Operated Check, Flow Control
Sg Construction
Hardened Steel Internal Parts, Aluminum Nameplate
Sg Features
Save Space and Installation Time. Reduce Potential Leaks. Standard Interface. Rugged Design with Large Flow Passages, High Pressure and High Flow Ratings
Sg Fluid Temperature Range
50 to 129 deg F Water Based Fluids
Sg Mounting Bolts
#10-24 Grade 8 Socket Head Cap Screws Lubricated and Torqued to 63 to 80 lb-in. Bolt Kits On
Sg Recommended Filtration
Upto 3000 psi ISO Level 20/16, Over 3000 psi ISO Level 18/14
Valve Mount Type
Subplate/Manifold

Product Questions & Answers (3)

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Question by: Randy O on Dec 20, 2025, 11:42 AM
Got a DGMDC-3-Y-PM-41 going on a manifold block. what kind of bolts do we need and how tight should they be?
Answer by: Customer Support on Dec 22, 2025, 6:51 AM
Fasten these units using 10-24 grade 8 socket head cap screws. You will want to lubricate the threads and torque them down to somewhere between 63 and 80 inch pounds for proper seating.
Question by: Frank W on May 9, 2025, 8:51 AM
Trying to swap out a stack valve, is this one the D03 SystemStak check in P with free flow toward the work port, and is it the 41 design?
Answer by: Customer Support on May 11, 2025, 7:23 AM
For replacement matching, the identifiers on this valve are DGMDC-3-Y-PM-41 (41 design) and catalog number C1JL49. Function-wise it is a check in P with free flow toward the work port, and it is an NFPA-D03 size SystemStak style valve.
Question by: Rusty C on Mar 4, 2026, 2:16 PM
i’m trying to stop oil from sneakin back the wrong way. which direction does this D03 SystemStak check valve let flow go?
Answer by: Customer Support on Mar 6, 2026, 8:55 AM
Function-wise, it allows free flow toward the work port when the check is in the P line, and it blocks flow in the opposite direction.

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