Yamada 771341 Valve Stopper, polypropylene for NDP-15

Basic Info

Warranty Info

Literature

Rebate Info

Video

Brand
Yamada

Manufacturer
Yamada America

Manufacturer Part Number
771341

Country of Origin
Japan

Special Order
No

Exportable
Yes

HTS Code
8413.91.9096

Truck Freight
No

Quantity In Stock
12

On Order
0

Your Price
$27.00

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Yamada 771341 Valve Stopper, polypropylene for NDP-15

The Yamada 771341 is the genuine replacement valve stopper specified for DP-15 and NDP-15 Series pumps with polypropylene wet ends. It is a small part that quietly controls the geometry of the check valve above it.

Because the guide, ball and seat form one check valve assembly, they are best treated as a set. Fitting a new ball and seat under a worn guide simply means the new parts are held in the wrong geometry from the first stroke.

Key Features

Genuine Yamada replacement valve stopper
Material: polypropylene
Fits DP-15 and NDP-15 Series pumps with polypropylene wet ends
4 per pump in a standard pump build
Keeps the check ball captive and centered over its seat
Replace together with the balls and seats

Applications

DP-15 and NDP-15 Series pumps with polypropylene wet ends
Wet end rebuilds and liquid side overhauls
Replacing a cracked or eroded guide
Restoring even check valve wear
Service after abrasive or solids laden duty
Marine, industrial and chemical transfer applications

Specifications

Brand: Yamada
Manufacturer: Yamada America
Manufacturer Part Number: 771341
Part Type: Valve Stopper
Material: Polypropylene
Fits: DP-15 and NDP-15 Series pumps with polypropylene wet ends
Quantity Used: 4 per pump
Series Port Size: 1/2 in on the NDP-15 Series
Condition: New

Frequently Asked Questions

Q: Are guides handed?
Yes, they fit one way round over the seat. Note the orientation of the old ones before removing them.

Q: What happens if a guide breaks?
The ball loses its limit stop and the broken pieces travel with the flow. They usually end up jammed in another check valve or in the discharge manifold, so a pump that suddenly stops delivering after a guide failure needs a full wet end inspection.

Q: How much ball lift is correct?
Enough to pass full flow and no more. That is what the guide sets, which is why guides are specific to the model and are not interchangeable between pump sizes.

Q: Can I run the pump without a guide?
No. The ball will not reseat consistently, output will be erratic and the seat will be hammered out of shape quickly.

Not sure this is the right part? Send us a Picture of the Pump Plate on your pump and the CLR Marine team will confirm the correct valve stopper.

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