PULSAtron L0301400-THY Replacement Diaphragm

The PULSAtron L0301400-THY is a genuine replacement metering pump diaphragm used with compatible PULSAtron pumps. Pulsafeeder parts documentation identifies this component as Item 2 — Diaphragm for pump configurations having 7 in the fourth model-number position.

Current replacement-parts documentation identifies the L0301400-THY as a 2.500-inch diaphragm for a PULSAtron size 7 pump head. The diaphragm is documented with TFE/Hypalon construction for use as the flexible pumping element within the liquid end.

L0301400-THY Product Details

• Part Number: L0301400-THY
• Product Type: Replacement Pump Diaphragm
• Product Family: PULSAtron
• Component Position: Item 2 — Diaphragm
• Pump Head Size: Size 7
• Diaphragm Size: 2.500 Inches
• Documented Material: TFE / Hypalon
• Application: Compatible PULSAtron Chemical Metering Pumps

The Pumping Element Inside the Liquid End

The diaphragm is one of the central operating components of a PULSAtron metering pump. During operation, it repeatedly flexes to change the internal volume of the liquid end.

This movement creates the suction and discharge cycles that draw chemical into the pump head and then deliver a controlled quantity through the discharge side.

Size 7 PULSAtron Application

Pulsafeeder parts documentation uses the fourth position of the pump model number to determine the appropriate diaphragm. For the relevant wet-end configurations, a pump with 7 in position four uses diaphragm L0301400-THY.

This provides a more reliable way to identify the replacement diaphragm than selecting a part based only on the visual appearance of the existing component.

2.500-Inch Diaphragm

Replacement-parts documentation identifies the L0301400-THY as a 2.500-inch diaphragm for PULSAtron pump head size 7.

Because PULSAtron pumps are available in several head sizes, the correct diaphragm part number should be matched to the pump model before installation.

TFE / Hypalon Construction

The L0301400-THY is documented as a TFE/Hypalon diaphragm. This material arrangement provides the flexible pumping surface required for repeated metering cycles while separating the chemical liquid end from the pump drive mechanism.

Chemical compatibility should always be confirmed for the specific solution, concentration and operating temperature before installation.

How the Diaphragm Works

During the suction stroke, diaphragm movement increases the liquid-end volume and helps draw chemical through the suction check valve.

During the discharge stroke, movement in the opposite direction reduces the chamber volume and forces chemical toward the discharge check valve.

The diaphragm therefore operates continuously whenever the pump is running and is a normal service component within the metering pump liquid end.

Why Diaphragm Condition Matters

A diaphragm must remain flexible and intact to maintain dependable metering performance. Chemical exposure and repeated mechanical cycling can gradually affect its condition.

A worn diaphragm may contribute to reduced pumping performance or unreliable chemical delivery and should be inspected as part of scheduled liquid-end maintenance.

When to Inspect or Replace the Diaphragm

• Scheduled preventive maintenance is due
• Pump output becomes inconsistent
• Visible wear or deterioration is present
• The liquid end is being rebuilt
• The existing diaphragm has been chemically damaged
• The pump is being serviced with matched wet-end replacement components

Individual Replacement Component

L0301400-THY is the diaphragm itself. It should not be confused with a PULSAtron KOPkit, pump head, valve assembly or complete liquid-end rebuild kit.

When a complete wet-end overhaul is required, the appropriate KOPkit may include a diaphragm together with additional pump-head and valve components.

Part Number Identification

PULSAtron parts documentation shows a progression of diaphragm part numbers according to pump-head size. The documented sequence includes:

• L0301100-THY — corresponding size configuration 4
• L0301200-THY — corresponding size configuration 5
• L0301300-THY — corresponding size configuration 6
• L0301400-THY — corresponding size configuration 7

This makes it important to confirm the complete pump model instead of substituting another diaphragm solely because it appears similar.

Replacement Selection

Select L0301400-THY when Pulsafeeder parts documentation for the existing PULSAtron pump identifies this diaphragm part number. Confirm the complete pump model and size configuration before installation.