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Lennox 18M40 / 150951-030 OEM TXV Expansion Valve – 8 Ton, R-22 / R-407C Thermal Expansion Valve

Name: Lennox 18M40 / 150951-030 OEM TXV Expansion Valve – 8 Ton, R-22 / R-407C Thermal Expansion Valve
Brand: Lennox
SKU: 66255128489
Price: 205.74 USD
Availability: InStock

In stock

$205.74 USD

Sale Sold out

Shipping calculated at checkout.

Lennox 18M40 / 150951-030 8-Ton TXV Expansion Valve

Genuine Lennox OEM thermal expansion valve
Designed for 8-ton HVAC applications
R-22 / R-407C refrigerant application
Controls refrigerant flow entering the evaporator
OEM replacement for compatible Lennox, Armstrong and Ducane equipment

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Specifications

Specification

Details

Brand

Lennox

Catalog Number

18M40

Model / Part Number

150951-030

Product Type

Thermal Expansion Valve

Common Name

TXV

Nominal Capacity

8 Ton

Nominal Capacity Class

96,000 BTU

Refrigerant Application

R-22 / R-407C

Function

Refrigerant Metering

Application

Evaporator / HVAC Refrigeration Circuit

Equipment Type

Commercial HVAC

OEM Component

Yes

description

The Lennox 18M40, model/part 150951-030, is an OEM thermal expansion valve (TXV) designed for select Lennox, Armstrong, and Ducane HVAC equipment.

This TXV is identified for 8-ton applications using R-22 / R-407C refrigerant applications. It regulates the amount of liquid refrigerant entering the evaporator based on operating conditions, helping maintain proper superheat and system performance.

Key Features & Function

Genuine Lennox OEM expansion valve
Cat #: 18M40
Model / Part #: 150951-030
Thermal Expansion Valve (TXV)
8 Ton application
Designed for R-22 / R-407C applications
Refrigerant metering device
Regulates liquid refrigerant entering the evaporator
Helps maintain proper evaporator superheat
Designed for select Lennox HVAC equipment
Also found in select Armstrong and Ducane applications
Commercial HVAC replacement component

Product Details & Key Specifications

Specification	Details
Brand	Lennox
Catalog Number	18M40
Model / Part Number	150951-030
Product Type	Thermal Expansion Valve
Common Name	TXV
Nominal Capacity	8 Ton
Nominal Capacity Class	96,000 BTU
Refrigerant Application	R-22 / R-407C
Function	Refrigerant Metering
Application	Evaporator / HVAC Refrigeration Circuit
Equipment Type	Commercial HVAC
OEM Component	Yes

🛠️ HVAC Depot Pro Tip

The 18M40 / 150951-030 should not be selected based on tonnage alone. TXVs must be matched to the refrigerant and equipment configuration.

Verify:

Catalog Number: 18M40
Part Number: 150951-030
Capacity: 8 Ton
Refrigerant Application: R-22 / R-407C
Component: Thermal Expansion Valve / TXV

Before replacing the valve, verify the complete equipment model and serial number, refrigerant, valve connection sizes, equalizer configuration, distributor configuration, and manufacturer charging specifications.

Equipment / Model Compatibility

The Lennox 18M40 / 150951-030 is designed for select Lennox commercial HVAC equipment requiring this specific expansion valve.

Applications may include:

Select Lennox commercial air-conditioning equipment
Select Lennox packaged equipment
Select Armstrong HVAC equipment
Select Ducane HVAC equipment
8-ton HVAC applications
R-22 refrigeration circuits
R-407C-compatible applications
Equipment specifically calling for 18M40
Equipment specifically calling for 150951-030

Always verify the complete equipment model and serial number before ordering.

Specification

Refund policy

Refund & Return Policy

Last Updated: June 2026

At HVAC Parts & Equipment Depot, customer satisfaction is important to us. This Refund & Return Policy explains how returns, exchanges, and refunds are handled for purchases made through TopHVACParts.com.

Return Eligibility

We accept returns within 30 days of delivery.

To qualify for a return:

The item must be unused, uninstalled, and in its original condition.
The item must be returned in its original packaging.
Model numbers and serial numbers must match the original purchase records.
Proof of purchase or order confirmation is required.

Non-Returnable Items

The following items are not eligible for return or refund:

Installed or used parts.
Products showing signs of installation, modification, or damage caused after delivery.
Items missing original packaging.
Sale or clearance items.
Special-order or custom-order products.
Returns requested more than 30 days after delivery.

Restocking Fee

Approved returns may be subject to a 20% restocking fee.

The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.

Damaged, Defective, or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.

Email: support@tophvacparts.com
Phone: (214) 734-5222

We may request photographs and additional information to help process your claim.

If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.

Exchanges

We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.

To request an exchange, contact us at:

support@tophvacparts.com

Refund Process

Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.

If approved:

Refunds will be issued to the original payment method.
Processing typically takes 7–14 business days after approval.
Your financial institution may require additional time before the refund appears in your account.

Return Shipping

Customers are responsible for return shipping costs unless the return is the result of:

Our shipping error,
A defective product,
A damaged product received upon delivery.

Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

Refund & Return Policy

Last Updated: June 2026

Return Eligibility

We accept returns within 30 days of delivery.

To qualify for a return:

The item must be unused, uninstalled, and in its original condition.
The item must be returned in its original packaging.
Model numbers and serial numbers must match the original purchase records.
Proof of purchase or order confirmation is required.

Non-Returnable Items

The following items are not eligible for return or refund:

Installed or used parts.
Products showing signs of installation, modification, or damage caused after delivery.
Items missing original packaging.
Sale or clearance items.
Special-order or custom-order products.
Returns requested more than 30 days after delivery.

Restocking Fee

Approved returns may be subject to a 20% restocking fee.

The restocking fee will be deducted from the refund amount after the returned item has been inspected and approved.

Damaged, Defective, or Incorrect Items

If you receive a damaged, defective, or incorrect item, please contact us within 7 days of delivery.

Email: support@tophvacparts.com
Phone: (214) 734-5222

We may request photographs and additional information to help process your claim.

If the claim is approved, we will provide a replacement, exchange, or refund at no additional cost to you.

Exchanges

We replace items only if they are defective, damaged upon arrival, or incorrectly shipped.

To request an exchange, contact us at:

support@tophvacparts.com

Refund Process

Once your return is received and inspected, we will notify you by email regarding approval or rejection of your refund request.

If approved:

Refunds will be issued to the original payment method.
Processing typically takes 7–14 business days after approval.
Your financial institution may require additional time before the refund appears in your account.

Return Shipping

Customers are responsible for return shipping costs unless the return is the result of:

Our shipping error,
A defective product,
A damaged product received upon delivery.

Original shipping charges are non-refundable.

We recommend using a trackable shipping service and purchasing shipping insurance for higher-value items.

Return Address

HVAC Parts & Equipment Depot
1135 E Plano Parkway, Suite 8
Plano, TX 75074
United States

Professional Installation Notice

Many HVAC products require installation by a licensed HVAC professional.

HVAC Parts & Equipment Depot is not responsible for damages resulting from improper installation, misuse, unauthorized modifications, or failure to follow manufacturer instructions.

Special Orders

Special-order products must be picked up within 30 days of purchase unless other arrangements have been approved.

Unclaimed special-order products may be returned to the manufacturer and may be subject to applicable restocking fees.

Contact Us

If you have questions regarding returns, refunds, or exchanges, please contact us:

HVAC Parts & Equipment Depot

Phone: (214) 734-5222
Email: support@tophvacparts.com

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Can anyone buy from your store, or do I need to be a licensed contractor?

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What kinds of HVAC parts do you sell?

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Do you sell parts for specific brands like Trane, Goodman, or Lennox?

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Can you help me find the right part for my system?

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Do you offer returns or exchanges on parts?

Yes, we accept returns or exchanges within a set time period—just make sure the item is unused and in original packaging. Ask for specific terms at the counter.

Do you provide technical support or installation services?

While we don't install, we can answer basic questions and refer you to trusted local HVAC technicians if needed.

Do you sell refrigerants to the public?

We sell certain refrigerants, but EPA regulations require certification for purchase of products like R-410A or R-22.

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Lennox 18M40 / 150951-030 OEM TXV Expansion Valve – 8 Ton, R-22 / R-407C Thermal Expansion Valve