Stainless Steel Silent Check Valve – Spring Loaded, Non-Slam, 304, 1/2″–2″

وصف المنتج

The SC-1 is a one-piece silent check valve — also sold as a spring check valve or inline check valve. A stainless spring pushes the piston closed قبل flow fully reverses, so the valve shuts quietly instead of slamming and puts far less shock on pumps and pipes when the pump stops. The one-piece body is compact enough for tight spaces around pumps and manifolds.

The body, piston and cap are cast 304 stainless steel (CF8), with a CF8M (cast 316) version made to order. Female PT threads are in stock, sizes 1/2″ to 2″; NPT and PF can be made to order. Prefer a hinged-disc valve with lower pressure drop? See the stainless steel swing check valve, ، أو تصفح الكل صمامات فحص من الفولاذ المقاوم للصدأ.

Silent (Spring) or Swing — Which Check Valve?

المواصفات الفنية الرئيسية

التطبيقات

• Pump discharge lines — the spring closes the valve before reverse flow builds, which reduces slam and pressure surge when the pump trips.
• Municipal water supply and booster pump stations — quiet, fast-closing check duty on clean water.
• HVAC and high-rise booster systems — silent closing in mechanical rooms next to occupied space.
• Cooling-water loops — clean water only; not for media with suspended solids.
• Pump skids and tight manifolds — the short one-piece body fits where a swing check will not.
• Vertical lines with upward flow — the spring closes the valve, so it does not rely on gravity.
• Small-bore, low-pressure water distribution lines — 1/2″–2″ threaded connections.
• Water treatment plants — clean-water lines and pump discharge, not sludge.

Where slam noise is not a concern and the line is horizontal, the stainless steel swing check valve is the lower-cost option; for 2″–4″ flanged lines, see the stainless steel flanged check valve.

الأسئلة الشائعة

Why is it called a silent check valve? Because it closes quietly. The spring pushes the piston shut before flow fully reverses, so very little backflow builds up to slam the valve. That greatly reduces the bang often heard when a swing check valve shuts after a pump stops.

Is this the same as a spring check valve or inline check valve? Yes — silent check valve, spring check valve and inline check valve are different names for the same design: a spring-loaded piston inside a straight one-piece body.

Silent or swing check — which one do I need? Choose this silent type for pump discharge and lines prone to water hammer. Choose the swing check valve where low pressure drop matters more — its disc swings fully clear of the bore.

ما هي المادة المصنوع منها؟ Body, piston and cap are cast 304 stainless steel (CF8) with a SS304 spring — in stock. A 316 version (CF8M castings, SS316 spring) is made to order.

ما هي معايير الخيوط المتوفرة؟ Female PT threads are in stock, sizes 1/2″–2″. NPT and PF can be made to order — tell us which standard your piping uses when you request a quote.

ما هو الحد الأدنى للطلب؟ No minimum order quantity — we accept orders of any size, including small trial orders.