A screw type butterfly valve uses threaded inserts or tapped lugs in the valve body — instead of through-bolts — to secure the valve between flanges. This design allows for easier installation in dead-end or isolating services because you don't need nuts on the back side of the flange. It's ideal for applications where you need to disconnect downstream piping without disturbing the upstream connection. Thriveon's screw type version is fully compliant with API 609 Table 3 (wafer) and Table 4 (lug) configurations.

Yes, when configured with a fully vulcanized seat (EPDM or PTFE) and the proper disc-to-seat interference fit, our screw type butterfly valve provides bi-directional zero-leakage capability at full rated pressure. Each valve is tested per API 598 / ISO 5208 Rate A in both directions. However, for critical bi-directional dead-end service, we recommend the lug-style configuration with threaded inserts for added mechanical security.

For custom configurations — including special disc coatings, non-standard bolt circles, or exotic alloys — our lead time is typically 5–7 weeks from engineering approval. For standard materials and dimensions (DN50-DN300, GGG40/SS316), we maintain inventory and can ship within 2–3 weeks. We work with weekly FOB Tianjin schedules to USA, Saudi Arabia, and South Africa.

We use rolled threads (instead of cut threads) for all screw inserts — this work-hardens the thread surface and reduces friction coefficient by 40%. Each thread is coated with a molybdenum disulfide (MoS₂) anti-seize layer before assembly. Additionally, we provide a thread gauge certification with every batch. Field data across 12,000+ installations shows a <0.3% field failure rate related to thread issues.

Absolutely. Our screw type butterfly valve top flange is machined to ISO 5211 standard — we offer direct mounting for pneumatic (double-acting/spring-return) and electric actuators (on-off or modulating). We can supply a fully assembled and tested actuator-valve unit with a 2-year warranty. Our engineering team can also provide actuator sizing calculations based on your line pressure and media viscosity.

For standard sizes (DN50-DN300) in ductile iron or SS316, our MOQ is 10 units per size. For custom specifications or exotic materials, the MOQ is typically 20–50 units, subject to engineering review. We also offer sample orders (1–5 units) for qualification purposes — samples are available at cost with a refundable deposit that is credited toward your first production order.

We provide a standard 18-month warranty from the date of shipment (or 12 months from commissioning, whichever comes first). For warranty claims, we require photo/video evidence and a returned sample for root-cause analysis. We typically issue a replacement or credit within 14 business days after confirmation. Our technical support team is available via WhatsApp and email during Chinese business hours (GMT+8) and we offer 24-hour emergency response for critical pipeline shutdowns.