A high pressure steam non return valve (also called a check valve) automatically prevents reverse flow in steam systems. It uses a spring-loaded or gravity-assisted disc that opens when forward steam pressure exceeds the cracking pressure (typically 0.5–5 psi), and closes instantly when flow reverses. This protects downstream equipment like turbines, boilers, and heat exchangers from damage caused by backflow and water hammer.

Swing check valves are ideal for low-to-medium steam velocities and offer low pressure drop; they're best for horizontal lines. Piston (lift) check valves provide faster closing and tighter sealing at high pressures, making them suitable for vertical lines and frequent cycling. Dual plate check valves are compact and lightweight, perfect for space-constrained installations, but have a lower maximum temperature rating (typically ≤ 450°F / 232°C). Your choice depends on system pressure, temperature, and installation orientation.

For steam up to 800°F (427°C), WCB (carbon steel) body with Stellite® 6 faced seats and graphite packing is the most common and cost-effective choice. For higher temperatures (up to 1,000°F / 538°C) or corrosive condensate, WC6 (1.25% Cr-0.5% Mo) or CF8M (316 stainless steel) are recommended. All alloys must meet NACE MR0175 for sour service if H₂S is present.

Proper sizing ensures the valve operates efficiently without excessive pressure drop or fluttering. Key parameters: steam flow rate (lb/hr or kg/hr), inlet pressure (psi or bar), outlet pressure, temperature, and pipe size. As a rule of thumb, the valve size should match the pipe size for most applications. Our engineering team offers free sizing calculations — simply provide your operating conditions via our contact form and we'll respond within 24 hours.

Our lead times are among the fastest in the industry: 7–15 working days for standard sizes (1/2"–12") in WCB, CF8M, or LCB with Class 150–600. For larger sizes (14"–24") or higher pressure classes (Class 900–2500), typical lead time is 4–6 weeks. Custom alloys like Alloy 20 or Hastelloy C276 require 6–8 weeks. We also offer express production (3–5 days) for emergency orders — contact us for availability.

Absolutely. We provide full OEM and ODM services, including custom end connections (special flange drilings, BW schedules, SW depths), special trim materials, non-standard pressure classes, and private labeling. Our in-house engineering team can modify valve designs to fit your exact piping layout and performance requirements. Minimum order quantity for customization is typically 10–20 units, depending on complexity.

We stand behind every valve with a 24-month warranty against manufacturing defects in materials and workmanship. Our technical support team — staffed by engineers with 10+ years of valve design experience — is available via email, WhatsApp, and phone during business hours (CST). We also offer free remote troubleshooting and can arrange on-site visits for large projects. Spare parts (discs, seats, springs, gaskets) are kept in stock for all standard models.

We ship via sea freight (FOB, CIF, DDP), air freight, or express (DHL/FedEx) depending on order size and urgency. All valves are packed in plywood crates with foam inserts to prevent transit damage. For DDP (Delivered Duty Paid) shipments to the USA, UK, and EU, we handle all customs clearance and import duties — you receive a single all-inclusive price with no surprises. We provide a proforma invoice with HS code (8481.30) for your reference.