The Z2S6 Hydraulic Pilot Check Valve is designed to ensure safe load holding, leak-free blocking, and controlled reverse flow in hydraulic systems where stability is critical.

As a professional manufacturer, BSTIND provides a high-performance alternative fully compatible with Bosch Rexroth standards. Our solution is widely used to replace rexroth z2s6 valves in industrial systems without requiring any modification.

Whether you are maintaining existing equipment or sourcing for new hydraulic assemblies, selecting the correct z2s6 valve configuration is essential for system reliability.

What is a Z2S6 Hydraulic Pilot Check Valve?

A Z2S6 hydraulic pilot check valve is a pilot-operated valve used to lock hydraulic flow in one direction and release it in the opposite direction when pilot pressure is applied. In simple terms, it holds a load in position (like a hydraulic cylinder) and only allows movement when a control signal (pilot pressure) opens the valve. It is typically:

  • Sandwich-mounted (NG6 / CETOP 3 size)
  • Used for load holding and safety locking
  • Common in systems where uncontrolled movement must be prevented (e.g., lifting or clamping)

One-line definition: A Z2S6 is a load-holding pilot check valve that keeps oil locked until pilot pressure unlocks it.

Z2S Hydraulic Pilot Check Valve

Z2S check valve diameter:
6=Size 6
10=Size 10
16=Size 16
22=Size 22

A.B cavity throttling =blank
À cavity throttle = A
B cavity throttle = B

Max pressure 31.5Mpa
Flow:50～300L/min

Understanding Model Codes

When users come across model codes such as Z2S6 1-6X or Z2S6 1-64, they are usually trying to answer one key question: Can this valve be directly replaced without modifying the system?

These model codes follow a clear engineering structure:

  • Z2S6 → Pilot-operated check valve, size NG6 (CETOP 3)
  • 1 → Functional configuration (internal flow path design)
  • -6X / -64 → Design series (revision or generation update)

From an application perspective, different design series (such as –6X and -64) typically do not affect mounting dimensions or interchangeability. Instead, they may reflect internal improvements like sealing performance or manufacturing updates.

That means in most cases, valves within the same model structure can be directly interchanged, as long as the key parameters match.

BSTIND valves are designed with this compatibility in mind, allowing reliable replacement of common configurations without system modification.

Z2S Hydraulic Valve Technical Documentation

This section provides a complete technical overview of the Z2S6 hydraulic pilot check valve, covering model code structure, hydraulic function representation, performance parameters, and installation dimensions. It is designed to help engineers and buyers quickly:

  • Understand valve configuration and options
  • Verify system compatibility and replacement feasibility
  • Evaluate performance under different operating conditions
  • Ensure correct installation within NG6 (CETOP 3) hydraulic systems

Ordering Code Structure

Hydraulic Symbol

Technical Data

Technical Data

Unit Dimensions

Z2S Hydraulic Valve Applications

Hydraulic Press Systems

Injection Molding Machines

Construction Equipment

How to Choose the Right Z2S?

Selecting the right Z2S pilot-operated check valve is not just about matching a model number — it’s about ensuring safe load holding, system compatibility, and stable hydraulic performance.In most cases, users are trying to answer a practical question: Can this valve directly replace my existing one without causing system issues? To make the right choice, focus on the following key factors:

1. Confirm Valve Size (NG6 / NG10)

Z2S6 is NG6 (CETOP 3), Z2S10 is NG10 (CETOP 5). Size defines mounting interface and flow capacity. Mismatch causes installation issues.

2. Check Functional Configuration

Variants define internal flow path and pilot logic. Matching function ensures correct load holding and stable actuator behavior.

3. Verify Design Series (e.g. -6X, -64)

Design series are revisions within same platform. They usually do not affect dimensions or installation compatibility.

4. Check Operating Parameters

Check pressure, flow, and pilot ratio. Incorrect values may cause instability, leakage, or reduced valve service life.

5. Ensure Mounting Compatibility

Z2S uses NG6/NG10 sandwich plate mounting. Interface must match to ensure direct installation without system modification.

6. Consider Application Requirements

Different systems require different performance levels. Load holding, cycling frequency, and precision all affect valve selection.

Why Choose Bstind Z2S6?

BSTIND specializes in manufacturing Rexroth-compatible hydraulic valves designed to deliver consistent performance, precise interchangeability, and stable operation in demanding hydraulic systems. Our focus is on ensuring reliable replacement solutions that meet industrial application requirements while maintaining cost efficiency. We provide:

  • OEM-level manufacturing standards

  • Strict dimensional and interface accuracy

  • Reliable performance under high-pressure cycling

  • Stable and responsive global supply capability

  • Competitive cost structure for system optimization

Hydraulic Valve Z2S6 FAQs

Yes. Bstind Z2S6 valves are fully interchangeable in terms of installation and function.

No. They mainly represent internal revisions and do not change mounting dimensions.

It depends on system flow and load requirements. Higher flow systems typically require Z2S10.

Yes. We provide full technical documentation including dimensions, symbols, and performance data.

Yes. BSTIND supports OEM, distributor, and bulk industrial supply.

Get a Quote

If you are currently sourcing or replacing a Rexroth, Yuken or Vicker hydraulic valve, Bstind can provide a reliable and cost-effective solution tailored to your system requirements.

👉 Contact our engineering team for technical support and quotation.

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