ASCO PB31A Pressure Switch
Ensure precise industrial monitoring with the ASCO PB31A Tri-Point Pressure Switch. UL listed and rated for ambient temperatures up to 50°C, this durable switch is fully compatible with air, water, and hydraulic oil. Featuring versatile AC/DC electrical and horsepower ratings, it is the ideal solution for limit controls, heating and cooling appliances, and sprinkler alarm systems.
ASCO PB31A Pressure Switch
The ASCO PB31A is a highly reliable Tri-Point Pressure Switch engineered for versatile industrial applications. Designed for precision and durability, this switch is suitable for regulating and monitoring air, water, and hydraulic oil mediums. It features robust electrical capabilities, including 5A resistive at 125/250 VAC, and operates efficiently in ambient temperatures up to 50°C. With extensive UL listings across multiple categories—such as limit controls, industrial control equipment, heating and cooling appliances, and sprinkler system alarms—the ASCO PB31A ensures safety, compliance, and dependable performance in demanding commercial and industrial environments.
Technical Specifications:
- Brand: ASCO
- Model: PB31A (Tri-Point Catalog No. PB31A)
- Maximum Ambient Temperature: 50°C
- AC Electrical Ratings: 5A Resistive at 125 or 250 VAC; 90 W at 125 V; 180 W at 250 V
- DC Electrical Ratings: 1/2 A Resistive at 125 VDC; 1/4 A Resistive at 250 VDC
- Horsepower Ratings: 1/8 HP at 125 VAC; 1/4 HP at 250 VAC
- Compatible Mediums: Air, Water, and Hydraulic Oil
- Certifications & Listings: UL Listed (Limit Controls, Industrial Control Equipment, Heating & Cooling Appliances, Sprinkler System Alarm, Temperature-Indicating & Regulating Equipment)

| Brand | Asco |
|---|---|
| Model | PB31A |
GENERAL DELIVERY INFORMATION
Thank you for visiting and shopping at www.zxanhyd.com. Following are the terms and conditions for the Shipping Policy for ZXAN Hydraulic.
Orders will be processed and shipping during standard working hours (0830 – 1730 BST) Monday to Friday (excluding Bank Holidays)., are processed and despatched on the same business day. If we are experiencing a high volume of orders, shipments may be delayed by 1-2 Days. Please allow additional days in transit for delivery. If there will be a significant delay in shipment of your order, we will contact you via email or telephone.
NTERNATIONAL DELIVERY RATES & ESTIMATES
Shipping charges for your order will depend on weight and country the order is to be shipped to. All cost will be calculated and displayed at checkout. All orders for delivery within the Asia will arrive on a 2-5 day delivery service depending on Country location. All shipments outside the Asia will arrive on a 3–7-day delivery service depending on Country location. Please check for accurate delivery times with our Sales department. If you Parcel has not arrived within the time expected please do not hesitate to contact us. Please ensure the ship to address you type during checkout is correct. We are not responsible for any wrong or undeliverable addresses.
CUSTOMS, DUTIES AND TAXES
Import duties, taxes, and brokerage fees are not included in the product price or shipping and handling cost. These charges are the buyer’s responsibility as we are only charging the transportation fee for your order. You may check with your country’s customs office to determine if there will be additional costs. The buyer is responsible for obtaining information regarding their country’s laws, regulations, and restrictions that may apply when purchasing our products. By placing an international order (shipping outside of the China) the buyer is responsible for abiding by their country’s laws, regulations, and restrictions. If product is seized and destroyed by customs, we will NOT be responsible for the losses, product, or shipping refunds.
SHIPMENT CONFIRMATION & ORDER TRACKING
You will receive a Shipment Confirmation email once your order has shipped containing your tracking number(s). The tracking number will be active within 24 hours.
WORKING CLOSELY WITH TOP CARRIER EXPERTS
We use some of the top carrier companies in the world, although you can use your own carrier to collect the order. All deliveries require a signature on delivery. Below are our main carrier companies.

DAMAGES
ZXAN Hydraulic is not liable for any products damaged or lost during shipping. If you received your order damaged, please contact us to file a claim. Please save all packaging materials and damaged goods before filing a claim.
RETURNS POLICY
Our Return & Refund Policy provides detailed information about options and procedures for returning your order.

