MJSV-1 port arrangement
This pneumatic shuttle valve is the MJSV-1 reference with 1/8-inch female NPT connections at inlet A, inlet B and outlet C. The source shows other port combinations in the product family; those are not additional options for this exact page.
Flow function and its limit
The valve allows flow from A to C or from B to C while blocking the other inlet. The source explicitly says it should not be used as a pressure selector. Do not describe it as automatically selecting the higher-pressure source; that is not the stated function of this product.
The listed construction includes a brass body, stainless-steel shuttle and nitrile seals. Direct or in-line mounting is described by the source. Required fittings and the surrounding pneumatic circuit still need to match the selected NPT port configuration.
Published pneumatic values
For air service, the listed maximum pressure is 300 psig. The source lists flow of 400 litres per minute at 50 psig and 740 litres per minute at 100 psig. Those are different operating points, not one flow value that applies at every pressure.
The page is focused on the researched pneumatic application. It does not approve a particular circuit design or treat a component's published value as the rating of a completed system.
Read the three-port layout
The A and B labels identify the two inlet connections, and C identifies the outlet. MJSV-1 uses female 1/8-inch NPT at all three positions. When reviewing an existing installation, compare each position individually. A valve with a male outlet or a G1/8 thread can look similar but is a different configuration in the source family.
This pneumatic shuttle valve has a moving shuttle that permits an inlet-to-outlet flow path while blocking the other inlet. Keep the source's restriction against pressure-selector use with the component specification. A generic description of shuttle-valve logic elsewhere should not override the specific restriction stated for MJSV-1.
Keep flow and pressure conditions together
The two published flow figures are tied to different pressure points. Keep 400 litres per minute with 50 psig and 740 litres per minute with 100 psig when comparing the listing with a requirement. Treating either number as an unconditional capacity would discard the operating condition that accompanies it.
The source also describes approximately 1 psig pressure to shift. That is a separate characteristic from maximum air-service pressure, and the approximate value should remain labelled as such. Circuit performance still depends on the connected components and operating conditions. The request identifies the valve to investigate; it does not approve a pneumatic circuit or its installation.
Request availability
One proposed unit represents one MJSV-1 valve. It does not include tubing, fittings or a complete control circuit. Review the exact SKU and quantity with your name and email before confirmation. Availability, final price and delivery timing must be confirmed before any purchase; no payment is collected and no order or fulfillment is authorized.
Questions about MJSV-1
- Is this pneumatic shuttle valve a pressure selector?
- No. The source explicitly says it must not be used as a pressure selector.
- Are the ports G⅛ or NPT?
- MJSV-1 has 1/8-inch female NPT connections at A, B and C. Other family configurations are separate references.
- Are fittings included?
- No tubing or fittings are represented as included in this valve request.
- Does confirmation activate an order?
- No. It records interest in the exact valve and quantity, pending separate confirmation of availability and final terms.