A male female valve has one male threaded end and one female threaded end, allowing direct connection between a pipe (female) and a fitting or another valve (male). This design simplifies installation in tight spaces, reduces the number of adapters needed, and provides a more rigid assembly. Standard threaded valves typically have both ends female (F-F).

Yes. All our male female valve products are available with NPT threads manufactured to ASME B1.20.1. We maintain dedicated NPT thread gauges (L1 and L2) calibrated to NIST-traceable standards. Each valve is go/no-go gauge checked before packing. We also supply BSPT and BSPP configurations for EU, Middle East, and Asian markets.

For standard sizes (1/2″ to 2″) in WCB or CF8M, our MOQ is 50 units per size/type. For non-standard sizes, custom materials, or special thread forms, the MOQ is 200–500 units. We do accept sample orders (1–5 pcs) for qualification purposes — these are typically shipped within 5 working days via FedEx or DHL.

Stainless steel threads (CF8M, CF3M, 316L) are prone to galling due to material softness and work hardening. We apply a MIL-SPEC phosphate coating (0.0002–0.0004″ thick) or a silver-based anti-seize compound at the thread root. All stainless steel valves are assembled and disassembled three times during QC to verify thread release. Our customer-reported galling rate over the last 3 years is 0.03%.

Each shipment includes: Material Test Reports (MTRs) with heat numbers, pressure test certificates (hydrostatic & pneumatic), dimensional inspection reports, NPT thread gauge certification, and a certificate of conformance (ISO 9001:2025). For EU shipments, we provide CE/PED Declaration of Conformity. For Canadian orders, CRN registration is available upon request. Additional documentation (NACE, ATEX, SIL) can be included at no extra charge for qualified orders.

Standard sea freight from Shanghai/Ningbo to Houston, Los Angeles, or New York takes 22–28 days. FOB or CIF terms are available. For a typical 20ft container (8,000–12,000 valves depending on size), sea freight costs approximately $2,800–$4,200 (subject to market rates). Air freight (7–10 days) is available for urgent orders. We also offer DDP (Delivered Duty Paid) for US customers who prefer a single landed cost.

Absolutely. Our engineering team has extensive experience modifying thread engagement length, wrench flat dimensions, and overall face-to-face length for OEM applications. We can also add internal hex drives, cross-drilled holes, or custom marking. Typical turnaround for custom drawings is 24–48 hours. Tooling modifications are usually free for orders above 500 units.

We accept T/T (wire transfer), L/C (irrevocable, confirmed), and for established customers — net 30/60 terms after credit review. For new customers, we typically require 30% deposit with 70% against copy of shipping documents. We also accept payments via PayPal for sample orders (maximum $2,000). All payments are processed through our Hong Kong treasury center for fast settlement.