Shijiazhuang Laiye Imort& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of z2fs16 sandwich throttle valve – rexroth substitute in China, also supports customized service. If you're going to wholesale high quality z2fs16 sandwich throttle valve – rexroth substitute made in China, welcome to get pricelist from our factory.
Technical details About This check valve
The body is cast iron (HT300), stress‑relieved and phosphated for corrosion resistance. All metering edges are deburred by hand – no sharp transitions that cause flow ripple.
NG16 size, ISO 4401-07-07-0-05 mounting interface
Max pressure: 315 bar (all ports)
Flow range: 0 to 160 L/min (depending on pressure drop and setting)
Throttle type: single or double, both adjustable with knob or hex key
Leakage at closed position: ≤ 5 ml/min (internal, at 315 bar)
Stacking height: exactly 48 mm – matches Rexroth dimension
Where to use this valve
We sell this Rexroth hydraulic substitute into:
Plastic injection molding machines – core speed control, ejector plate damping
Machine tools – feed rate control on hydraulic slide units
Presses – cushion pin speed adjustment
Test rigs – fine flow trimming
The double‑throttle version works well for meter‑out control on overrunning loads (e.g., vertical cylinders). The single‑throttle version is simpler for meter‑in only, where the return side needs full flow.
Do not use the standard version with water‑glycol (HFC) or phosphate ester (HFD) fluids. We offer FKM seals and stainless steel internals for those – lead time 3 weeks. Also, the adjustment knob is not a flow meter. If you need precise setting without a flow meter, order the version with a digital scale (optional).
One-stop Cosmetic Hydraulic parts Factory in China
Shijiazhuang Laiye Import & Export Trading Co., Ltd operates under Hebei Wendefu Hydraulic Technology Co., Ltd., a high‑tech enterprise started in 1988. We design and produce directional valves, pressure valves, flow valves, and accessories. Our team includes former hydraulic system engineers who specify these components for actual machinery. That experience shows in small details – like the backup rings we add on sandwich interfaces, which most competitors skip. Our products go to Russia, Europe, the Middle East, South America, and Asia. Customers tell us our sandwich plate flow control valves hold adjustment longer than other Chinese alternatives.
Frequently Asked Questions
How do I know if I need single or double throttle?
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Single throttle controls flow in one direction only. Fluid flows freely back through a built‑in check valve. Use this for meter‑in applications (pump to cylinder) where the return side has no speed requirement. Double throttle controls flow in both directions, each adjustable separately. Use this for meter‑out on vertical cylinders, or when you need different speeds for extend and retract. If unsure, order the double version – you can always leave one side fully open.
Can I stack this Z2FS16 with other sandwich valves (pressure reducing, check valves)?
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Yes – that is the point of sandwich design. The Z2FS16 throttle valve has through‑passages for all ports. You can stack it below a directional valve and above a pressure reducing valve. However, total stack height must not exceed the tie‑rod length on your manifold. We have seen customers stack three or four sandwich valves without issue. Just keep the tightening torque to 50 Nm for the through‑bolts – over‑tightening distorts the body and increases leakage.
What is the warranty and how do I return a defective unit?
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12 months from shipment. If a Z2FS16 throttle valve fails due to manufacturing (seat leakage exceeding 8 ml/min at closed position, stripped adjustment thread, body crack), we send a replacement by air. No need to return the defective valve unless we ask for failure analysis. Coil‑related issues do not apply – this valve has no coil. Damage from foreign particles in the oil (dirt scratching the needle seat) is not covered – we recommend a 25 µm filter upstream.
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