A pneumatic manual control valve combines a pneumatic actuator with a handwheel manual override. Use it when you need automated flow control but also want the ability to operate the valve manually during power loss, maintenance, or commissioning. Typical applications include water treatment, chemical dosing, and any process requiring fail‑safe accessibility.

Yes. Our valves are designed to meet ASME/EN face‑to‑face dimensions and bolt patterns. Many US customers have successfully retrofitted without piping modifications. We provide mounting kits for actuators and positioners. Always check the specific model – our engineering team can confirm compatibility within 24 hours.

Ningjin Thriveon Valve holds ISO 9001:2015 (quality management), CE (Pressure Equipment Directive), and RoHS. We can also provide SGS third‑party inspection reports. For pressure ratings, our Class 150/300 valves are designed to ASME B16.34. We do not yet have FDA or NSF certifications as standard, but we can offer materials with FDA‑compliant seals upon request.

For standard sizes (DN50–DN200) with common materials, lead time is 15–20 business days from order confirmation. Shipping via sea freight (FOB Tianjin or CIF US port) typically takes 20–30 days. We also offer air freight for urgent orders (3–5 days). Shipping costs vary by size and quantity; request a quote for exact pricing.

Absolutely. We provide free samples for qualified buyers (you pay shipping). Sample order lead time is 10–15 days. Contact our sales team with your target size, pressure class, and end connection – we’ll ship a production‑representative valve for your testing.

All our pneumatic manual control valves carry a 12‑month warranty from date of shipment against manufacturing defects. We provide technical support via email and WhatsApp. For complex issues, we can arrange video calls or send replacement parts within 72 hours. We also offer a 30‑day money‑back guarantee on first orders (conditions apply).

Start with your pipe size, media, pressure drop, and flow rate. Our engineering team uses standard Kv/Cv formulas to size the valve body and actuator torque. We provide a sizing questionnaire – usually we can recommend a model within one business day. For complex fluids (viscous, solids‑laden) we may request additional data.

We accept T/T (bank wire transfer) for standard orders, and L/C (letter of credit) for large or repeated shipments. For US customers, we also offer payment via PayPal for sample orders. Minimum order quantity (MOQ) for standard valves is 2 pieces; custom orders may have higher MOQ.