The Rexroth Z2FS6-2-4X/1Q (material no. R900481621) is a genuine Bosch Rexroth throttle check valve: size 6, A1 → A2, B1 → B2 or A2 → A1, B2 → B1, with mechanical actuation.
The throttle valve controls actuator speed by restricting flow; meter-in or meter-out configuration and the channel are coded in the type designation.
More Rexroth hydraulic and linear-motion parts: Bosch Rexroth range.
Rexroth describes it as follows: “Industrial hydraulic valve in a high performance range. Reliable throttling of the flow to setting.”
Technical data
| Material number | R900481621 |
|---|---|
| Type code | Z2FS6-2-4X/1Q |
| Operating pressure, max. | 350 bar |
| Max. flow | 80 l/min |
| Spool symbol | A1 → A2, B1 → B2 or A2 → A1, B2 → B1 |
| Type of connection | Sandwich plate |
| Size | 6 |
| Type of actuation | with mechanical actuation |
| Number of ports | 4 |
| Number of switching positions | 2 |
| Seals | NBR |
| Weight | 1.05 kg |
| Hydraulic fluids (per Rexroth) | HFC, HL, HLP, HLPD, HVLP, HVLPD |
| Product family | Z2FS6 |
| Data sheet | RD27506 |
| Brand | Bosch Rexroth |
| Condition | New, original |
At a glance
- Direct actuated
- Setscrew with lock nut
- Fine adjustment
Typical applications
- Stacked valve assemblies
- Presses
- Cylinder speed adjustment
- Machine tools and handling equipment
- Replacement of an existing flow valve
Compatibility and replacement
Order with the 10-character material number R900481621; in Rexroth codes every character (size, pressure stage, adjustment element, options and seals) changes the part, so the type code Z2FS6-2-4X/1Q on the nameplate should match exactly.
The values in the table come from the official Bosch Rexroth product data. If your old part shows a different series index (for example 5X instead of 6X), send us a photo and we will confirm the current equivalent.
Before you replace it
- Size and ISO 4401 pattern
- Adjustment element
- Meter-in or meter-out
Frequently asked questions
How is it connected?
Sandwich plate, according to the Bosch Rexroth product data.
Which spool symbol does it have?
A1 → A2, B1 → B2 or A2 → A1, B2 → B1, according to the Bosch Rexroth product data.
Which hydraulic fluids can it be used with?
Rexroth lists HFC, HL, HLP, HLPD, HVLP, HVLPD fluids for this part; check that the seal material suits your fluid.
Which seal material is fitted?
NBR, according to the Bosch Rexroth product data.
How is it actuated?
With mechanical actuation, according to the Bosch Rexroth product data.
Can you help me identify the right replacement?
Yes. Send us a photo of the label of the old part, or its full order code, and we will confirm the exact match or the official successor before quoting.
Do you ship to my country, and what is the warranty?
Yes. RendatSP ships worldwide from Yiwu, China, by air in 5 to 7 days once the part is ready, and every part carries a 1-year warranty. Send the order number and quantity on WhatsApp and we will reply with a quotation.
How to order
Message us the order number and quantity. For breakdowns, tell us the delivery address and we will offer the fastest shipping option. If the exact part is discontinued, we confirm the official successor before quoting.
Every part RendatSP supplies is new and original, carries a 1-year warranty and ships worldwide by air in 5 to 7 days once ready (shipping, payment and warranty). Send us the order number and quantity on WhatsApp or through the inquiry form and we will quote the same working day. Agents in Saudi Arabia, Iraq, the UAE, Egypt, Oman, Libya, Morocco, Mauritania, Yemen, Algeria and Jordan.
