Shijiazhuang Laiye Import& Export Trading Co., Ltd. is one of the leading manufacturers and suppliers of z2fs hydraulic throttle check valve in China, also supports customized service. If you're going to wholesale high quality z2fs hydraulic throttle check valve made in China, welcome to get pricelist from our factory.
Product Overview
The Z2FS hydraulic throttle check valve is a sandwich‑plate type flow control valve designed to regulate actuator speed in hydraulic circuits. It combines a throttle valve for forward flow adjustment and a check valve for free reverse flow. Built for continuous operation under demanding conditions, this valve delivers precise speed control, minimal pressure drop, and long service life.
At Onederful® Hydraulic, we manufacture this component with a strict focus on real‑world reliability – every valve is tested to ensure it meets your application's exact requirements.
Products Description
Key Technical Parameters
| Parameter | Value |
|---|---|
| Nominal size | NG6 / NG10 (ISO 4401‑03/05) |
| Max. operating pressure | 315 bar (4565 psi) |
| Max. flow rate | 60 L/min (NG6) / 120 L/min (NG10) |
| Adjustment type | Knob with scale, optional rotary lever or lockable actuator |
| Working temperature range | -20°C to +80°C (standard seals) |
| Fluid viscosity | 10 – 400 mm²/s |
| Weight | ~1.2 kg (NG6) / ~2.5 kg (NG10) |
Material & Construction
How It Works: Spool Switching & Oil Circuit Control
The valve operates on a simple but effective throttle + check valve principle:
Forward flow (throttling mode) – Oil enters port A → passes through an adjustable throttle orifice (needle‑type spool) → exits port B. Turning the actuator clockwise reduces the orifice area, lowering flow and actuator speed. Counter‑clockwise increases flow.
Reverse flow (free‑flow mode) – Oil from port B pushes the internal check valve spring open → flows directly to port A with almost no resistance. This allows rapid return strokes (e.g., cylinder retraction) without throttling loss.
Spool switching is not electromechanical here – it's hydromechanical: the check valve spool reacts automatically to pressure direction. For the throttle section, the operator manually rotates the adjustment knob, which moves a tapered needle spool axially, changing the flow passage area. The fine pitch ensures even small adjustments create predictable speed changes.
Why Choose Onederful® for Your Throttle Check Valve?
40+ Years of Pressure Valve Expertise
Our Manufacturing Process – From Raw Material to Ready‑to‑Ship
Proven Customer Cases
Years
Countries
staff
containers
Services We Offer for Every Z2FS Order
Free technical consulting – our sales engineers help select the correct orifice size and adjustment type for your circuit.
OEM service – provide your drawing or specifications; we customize port threads, seals, or adjustment knobs.
Fast shipping – sea / air / express (DHL, FedEx, UPS). Stock orders ship in 2‑3 business days.
12‑month warranty against B/L date, covering manufacturing defects.
Ready to start? Click or contact Nadia directly:
📞 WhatsApp / WeChat: +8619103298301
📧 nadia@wendefuvalve.com.cn
Frequently Asked Questions
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1. Can the Z2FS hydraulic throttle check valve be used for both meter‑in and meter‑out circuits?
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Yes. The valve is bidirectional in terms of mounting orientation – you can install it in either line. However, note that the check valve always allows free reverse flow; for meter‑out control, ensure the throttle section faces the cylinder return port.
2. How do I adjust the spool for fine flow control?
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Loosen the lock nut, then rotate the knob. Each full turn changes the orifice area progressively – not linearly. We recommend marking your desired setting under actual operating pressure. For lockable actuators, set and secure with the integrated locking screw.
3. What happens if I mount the valve upside down?
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Function remains unchanged. The internal check spring and throttle mechanism are position‑insensitive. Just ensure the port markings (A / B) match your circuit diagram.
4. Is the Z2FS compatible with phosphate ester fire‑resistant fluids?
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Yes – choose the FKM seal option (Viton) instead of standard NBR. Please specify your fluid type when ordering.
5. Do you provide test reports for each batch?
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Absolutely. Every production batch undergoes at least 10 inspection procedures, and we can supply a batch test certificate including pressure vs. flow curves. Third‑party inspection (e.g., SGS, BV) is also available at cost.
One-stop Hydraulic Parts Factory in China
Whether you need a single unit for troubleshooting or 500 pieces for a production line, Onederful® delivers the same consistent quality. Request a quote – let's make your hydraulic system run smoother, slower, or faster, exactly as you design it.
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