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- Pressure Connection Type: 1/8 in FNPT
- Housing Material: Steel
- Sample Line Connection Size: 1/8 in
- Overall Diameter: 7 7/8 in
- Mounting Hole Diameter: 5/16 in
- Material: Steel
Specifications
| Part Number | 1638-1 |
| Brand | Dwyer Instruments |
| Action | Standard |
| Contact Form | SPDT |
| Pressure Connection Type | 1/8 in FNPT |
| Range | 0.20-1.0" w.c. |
| Housing Material | Steel |
| Sample Line Connection Size | 1/8 in |
| Overall Diameter | 7 7/8 in |
| Mounting Hole Diameter | 5/16 in |
| Item | Pressure Switch |
| Factory On Setting | 0.2"wc |
| Factory Off Setting | 1"wc |
| Standards | CE, CSA, FM, RoHS, UL Listed |
| Application | Air Conditioning, Duct Heater Control, Industrial HVAC |
| Electrical Connection | Screw Terminals |
| Process Connection | 1/8" female NPT. |
| Features | Visible set point indicator simplifies operation and trouble shooting; Large diaphragm provides low range accuracy providing precise control; Current loads of up to 15 amps supports most small electrical loads supporting a broader range of HVAC and Process applications without the need for additional relays and components |
| Material | Steel |
| Mounting Orientation | Vertical |
| Pressure Setpoint Type | Adjustable |
| Product Type | Pressure Switch |
| Minimum Operating Temperature | -30 Degrees F |
| Maximum Differential Pressure Setting | 1 in wc |
| Maximum Operating Temperature | 110 Degrees F |
| Sample Line Connector Type | NPT |
| Mounting Hole Center to Center Distance | 3 in |
| Weight | 3 lb |
| Pressure Type | Differential |
| Maximum Pressure Setting | 1 in wc |
| Minimum Pressure Setting | 0.2 in wc |
| Maximum Pressure Rating | 10 psig |
| Repeatability | ±1%. |
| Service | Air and non-combustible, compatible gases. |
| Switch Type | SPDT. |
| Set Point Adjustment | Screw type with enclosed scale. |
| Temperature Limits | -30 to 110°F (-34.4 to 43.3°C). |
| Agency Approvals | CSA, FM, UL. |
Description
The Dwyer Instruments 1638-1 is a standard SPDT pressure switch with a 0.20 to 1.0 in H2O range and a steel housing. This type of switch actuates an electrical contact at a set pressure point, used for air conditioning, duct heater control, and industrial HVAC applications. It features a 1/8 in FNPT process connection and screw terminals, and is CE, CSA, FM, RoHS, and UL Listed.
| Shipping | This item ships to USA |
Processing Time:
All orders at Pro Replacement Parts are processed and shipped within 1-2 business days. For orders placed before 12 PM EST, we offer same-day shipping whenever possible. We aim to ensure that your order reaches you as quickly as possible.
Delivery Timeframe:
Our standard delivery window is between 3-8 business days, depending on your location. We partner with trusted carriers such as FedEx, UPS, USPS, and other local carriers to ensure your items arrive safely and on time.
Shipping Methods:
- Items exceeding 50” in width or 70 lbs in weight are shipped via Freight Carrier. You will be contacted by the carrier to schedule a delivery time.
- Items under 50” in width and 70 lbs in weight will be shipped via UPS or FedEx as a small package service.
Freight Shipments:
Freight shipments are delivered curbside in residential areas. You may need assistance to move the package indoors, or you can unbox the shipment and carry each piece inside individually. While some drivers may help move a shipment into a garage or carport, this is not guaranteed. For Inside Delivery requests, please contact us at the time of your order (additional fees apply). Email: support@proreplacementparts.com
Inspection and Damage:
Upon delivery, please inspect the carton and contents for any damage. If you find any damage, document it on the driver's delivery receipt and contact us immediately at support@proreplacementparts.com no later than 24 hours from the delivery time. We cannot accept responsibility for damage that is not noted on the driver's delivery receipt at the time of delivery.
Order Cancellations:
All order cancellations must be requested within 24 hours of placing the order. After this period, our standard return policy will take effect.
Thank you for choosing Pro Replacement Parts. We are dedicated to providing you with the best service and ensuring your orders are delivered in a timely and efficient manner. If you have any questions or need further assistance, please don't hesitate to contact us.
Wide Selection of Brands: At our store, you'll find an extensive range of electric motors from top brands in the industry. We carefully select our inventory to ensure that you have access to the best and most reliable products on the market. Whether you need a motor for an industrial machine, a household appliance, or a specialized project, we have something for everyone.
Customer-Centric Service: We believe in putting our customers first. Our team is committed to providing you with personalized service and support throughout your buying journey. From helping you choose the right motor for your needs to answering any queries you have after purchase, we're here to assist you every step of the way.
Competitive Pricing: We strive to offer our high-quality electric motors at competitive prices. Our goal is to provide you with the best value, ensuring that you get a top-performing motor without breaking the bank. Plus, our regular deals and promotions mean that you can save even more when you shop with us.
Reliable Shipping and Handling: While we don't offer same-day shipping, we understand the importance of timely delivery. That's why we work with reliable shipping partners to ensure that your order is processed, shipped, and delivered efficiently. You can trust us to get your electric motor to you in excellent condition and within a reasonable timeframe.
Knowledgeable Support: Our team is knowledgeable about the wide range of electric motors we offer. We can provide you with detailed information and specifications for each product, helping you make an informed decision. If you have any questions or need advice, our experts are just a call or email away.
Your purchase is covered by the Manufacturer’s Limited Warranty.
For return/refund information, please visit our Returns & Refunds page.
Description
- Pressure Connection Type: 1/8 in FNPT
- Housing Material: Steel
- Sample Line Connection Size: 1/8 in
- Overall Diameter: 7 7/8 in
- Mounting Hole Diameter: 5/16 in
- Material: Steel
Specifications
| Part Number | 1638-1 |
| Brand | Dwyer Instruments |
| Action | Standard |
| Contact Form | SPDT |
| Pressure Connection Type | 1/8 in FNPT |
| Range | 0.20-1.0" w.c. |
| Housing Material | Steel |
| Sample Line Connection Size | 1/8 in |
| Overall Diameter | 7 7/8 in |
| Mounting Hole Diameter | 5/16 in |
| Item | Pressure Switch |
| Factory On Setting | 0.2"wc |
| Factory Off Setting | 1"wc |
| Standards | CE, CSA, FM, RoHS, UL Listed |
| Application | Air Conditioning, Duct Heater Control, Industrial HVAC |
| Electrical Connection | Screw Terminals |
| Process Connection | 1/8" female NPT. |
| Features | Visible set point indicator simplifies operation and trouble shooting; Large diaphragm provides low range accuracy providing precise control; Current loads of up to 15 amps supports most small electrical loads supporting a broader range of HVAC and Process applications without the need for additional relays and components |
| Material | Steel |
| Mounting Orientation | Vertical |
| Pressure Setpoint Type | Adjustable |
| Product Type | Pressure Switch |
| Minimum Operating Temperature | -30 Degrees F |
| Maximum Differential Pressure Setting | 1 in wc |
| Maximum Operating Temperature | 110 Degrees F |
| Sample Line Connector Type | NPT |
| Mounting Hole Center to Center Distance | 3 in |
| Weight | 3 lb |
| Pressure Type | Differential |
| Maximum Pressure Setting | 1 in wc |
| Minimum Pressure Setting | 0.2 in wc |
| Maximum Pressure Rating | 10 psig |
| Repeatability | ±1%. |
| Service | Air and non-combustible, compatible gases. |
| Switch Type | SPDT. |
| Set Point Adjustment | Screw type with enclosed scale. |
| Temperature Limits | -30 to 110°F (-34.4 to 43.3°C). |
| Agency Approvals | CSA, FM, UL. |
Description
The Dwyer Instruments 1638-1 is a standard SPDT pressure switch with a 0.20 to 1.0 in H2O range and a steel housing. This type of switch actuates an electrical contact at a set pressure point, used for air conditioning, duct heater control, and industrial HVAC applications. It features a 1/8 in FNPT process connection and screw terminals, and is CE, CSA, FM, RoHS, and UL Listed.
Shipping
| Shipping | This item ships to USA |
Processing Time:
All orders at Pro Replacement Parts are processed and shipped within 1-2 business days. For orders placed before 12 PM EST, we offer same-day shipping whenever possible. We aim to ensure that your order reaches you as quickly as possible.
Delivery Timeframe:
Our standard delivery window is between 3-8 business days, depending on your location. We partner with trusted carriers such as FedEx, UPS, USPS, and other local carriers to ensure your items arrive safely and on time.
Shipping Methods:
- Items exceeding 50” in width or 70 lbs in weight are shipped via Freight Carrier. You will be contacted by the carrier to schedule a delivery time.
- Items under 50” in width and 70 lbs in weight will be shipped via UPS or FedEx as a small package service.
Freight Shipments:
Freight shipments are delivered curbside in residential areas. You may need assistance to move the package indoors, or you can unbox the shipment and carry each piece inside individually. While some drivers may help move a shipment into a garage or carport, this is not guaranteed. For Inside Delivery requests, please contact us at the time of your order (additional fees apply). Email: support@proreplacementparts.com
Inspection and Damage:
Upon delivery, please inspect the carton and contents for any damage. If you find any damage, document it on the driver's delivery receipt and contact us immediately at support@proreplacementparts.com no later than 24 hours from the delivery time. We cannot accept responsibility for damage that is not noted on the driver's delivery receipt at the time of delivery.
Order Cancellations:
All order cancellations must be requested within 24 hours of placing the order. After this period, our standard return policy will take effect.
Thank you for choosing Pro Replacement Parts. We are dedicated to providing you with the best service and ensuring your orders are delivered in a timely and efficient manner. If you have any questions or need further assistance, please don't hesitate to contact us.
Why Buy From Us?
Wide Selection of Brands: At our store, you'll find an extensive range of electric motors from top brands in the industry. We carefully select our inventory to ensure that you have access to the best and most reliable products on the market. Whether you need a motor for an industrial machine, a household appliance, or a specialized project, we have something for everyone.
Customer-Centric Service: We believe in putting our customers first. Our team is committed to providing you with personalized service and support throughout your buying journey. From helping you choose the right motor for your needs to answering any queries you have after purchase, we're here to assist you every step of the way.
Competitive Pricing: We strive to offer our high-quality electric motors at competitive prices. Our goal is to provide you with the best value, ensuring that you get a top-performing motor without breaking the bank. Plus, our regular deals and promotions mean that you can save even more when you shop with us.
Reliable Shipping and Handling: While we don't offer same-day shipping, we understand the importance of timely delivery. That's why we work with reliable shipping partners to ensure that your order is processed, shipped, and delivered efficiently. You can trust us to get your electric motor to you in excellent condition and within a reasonable timeframe.
Knowledgeable Support: Our team is knowledgeable about the wide range of electric motors we offer. We can provide you with detailed information and specifications for each product, helping you make an informed decision. If you have any questions or need advice, our experts are just a call or email away.
Warranty/Returns
Your purchase is covered by the Manufacturer’s Limited Warranty.
For return/refund information, please visit our Returns & Refunds page.
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