Stainless Steel 2In Air-Operated Double Diaphragm Pump SCS14

Stainless Steel 2 In Air-Operated Double Diaphragm Pump – SCS14 / SCS-14 Style

The Stainless Steel 2 In Air Operated Double Diaphragm (AODD) Pump (SCS14 / SCS-14 Style) is a heavy duty, pneumatically driven positive displacement pump for harsh industrial, marine and chemical transfer operations. This 2-inch unit is made from high-grade stainless steel resistant to corrosion and handles high viscosity fluids, shear sensitive emulsions and liquids with suspended solids without thermal degradation or mechanical seal failure. It has a non-lubricated air valve system. It functions reliably and explosion-proof in hazardous environments where electrical spark risk is strictly prohibited.

Model Details

• Manufacturer / Style: SCS14 / SCS-14 Style
• MPN: SCS-14-SS-2IN
• Pump Type: Air-Operated Double Diaphragm (AODD)
• Configuration: Double-acting, reciprocating pneumatic positive displacement

Key Features

1. Explosion-Proof Pneumatic Operation: Completely eliminates electric motors and control boxes, ensuring safe operation in volatile atmosphere zones.
2. Robust SCS14 / 316 Stainless Steel Casing: Offers supreme resistance against saltwater corrosion, strong acids, caustics, and chemical solvents.
3. Stall-Free Air Valve Mechanism: Engineered with a patented non-centering spring-assisted shifter that guarantees positive shifting without freezing or stalling.
4. Dry-Run Capability: Can run dry indefinitely without incurring damage to internal components, mechanical seals, or close-tolerance faces.
5. Variable Flow & Head Control: Easily regulates discharge pressure and volumetric output dynamically by altering input air pressure and needle valve settings.

Applications

• Marine and offshore ballast transfer, bilge stripping, and slop tank management
• Chemical processing plants handling aggressive solvents, acids, and caustics
• Paint, ink, and coating manufacturing requiring shear-sensitive transfer
• Wastewater and effluent treatment plants pumping sludge with high solid contents
• Food, beverage, and pharmaceutical fluid handling (with FDA-compliant elastomers)

Compatibility & Equipment Models

• Compatible with standard plant compressed air systems, nitrogen headers, and natural gas pneumatic supplies.
• Direct replacement fit for standard industrial 2-inch SCS14 specification manifolds and mounting hole templates.
• Works seamlessly with 3/4-inch Filter-Regulator-Lubricator (FRL) air prep units and standard 2-inch ANSI class 150 piping flanges.

Part Number Cross-References

• Yamada Style Reference: NDP-50 Series equivalent SCS14 bodies
• Wilden Equivalent Class: M200 / P200 2-inch metal series cross
• ARO Part Cross: 666230-XXX-C style configurations
• Sandpiper Equivalent: S20 Metallic series layout

Frequently Asked Questions

Can this SCS14 2-inch diaphragm pump handle abrasive slurries?

Yes. The 2-inch clearance allows it to pass solid particles up to 5/16 inch in diameter. Combined with hardened SCS14 stainless steel liquid paths and abrasion-resistant elastomer options like Santoprene or PTFE, it excels in abrasive sludge environments.

Does the pneumatic air motor require external line lubrication?

No. The advanced air distribution valve design is engineered for unlubricated compressed air operation, reducing maintenance overhead and preventing exhaust oil mist contamination in clean environments.

Is it safe to use this pump for closed discharge (dead-heading) scenarios?

Yes. Because it is a 1:1 pneumatic positive displacement device, the pump simply stalls when the discharge valve is closed and line pressure matches incoming air pressure, without overheating or damaging internal elements.

What is the advantage of SCS14 material over standard 304 stainless steel?

SCS14 is equivalent to ASTM CF8M (cast 316 stainless steel), which features a higher Molybdenum content. This provides significantly enhanced pitting and crevice corrosion resistance when exposed to marine chlorides and industrial chemicals.