Honeywell L91B1050 L91B1050/U Proportional Pressure Controller Honeywell Pressuretrol®
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- Description
- Specification
- Q&A
- Customer Reviews
We usually quote within 24 hours after we get your inquiry.If you are very urgent to get the price, please call us or tell us in
your email so that we will regard your inquiry priority.
2.How can I get a sample to check your quality?
After price confirmation, you can require for samples to check our quality. If you just need a blank sample to check the design and paper quality, we will provide you sample for free, as long as you afford the express freight.
3.How long can I expect to get the sample?
After you pay the sample charge and send us confirmed files, the samples will be ready for delivery in 3-7 days. The samples will be sent to you via express and arrive in 3-5 workdays.
You can use your own express account or prepay us if you do not have an account.
4. How long does the whole procedure being worked out?
After you place a order,the production handling time is about 45-60 days.
We need 15 days to prepare all the stuff then 30 days for manufacturing.
5.What about the transportation and delivery date?
Normally we use shipment to transprot the goods.It is about 25-40 days.It also denpends on which coutry and port you are.It could be shorter if you need to send the goods like Asian.
If there are some emergencies we can send the goods via air express, as long as you afford the traffic expense.
6.What is your term of delivery?
We accept EXW, FOB Shenzhen or FOB Guangzhou. You can choose the one which is the most convenient or cost effective for you.
7.What about the lead time for the mass production?
Honestly, it depends on the order quantity and the season you place the order.
8.Can we print our logo/website/company name on products?
Yes, please advise the size and Pantone Code of the logo.
9.What's the lead time for regular order?
14-21 days for order quantity lower than 5000pc; For more quantity, usually 30 days.
10.Do you inspect the finished products?
Yes, each step of production and finished products will be came out inspection by QC department before shipping.
I. Core Specifications
1. Pressure Range
Operating Pressure: 5–150 psi (0.35–10.30 bar)
Proportional / Differential Pressure Range: 5–23 psi (0.35–1.60 bar)
Maximum Sustained Pressure: 15.5 bar (225 psi)
2. Electrical & Output
Output: Single potentiometer, 140 Ω (outputs a variable resistance signal in response to pressure changes)
Rated Voltage: 24 VAC
3. Mechanical & Environmental
Sensing Element: Brass bellows
Connection: 1/4" NPT female thread
Temperature: 0–66 ℃ (32–150 ℉)
Dimensions: 146 × 114 × 70 mm; Weight: approx. 1.5 kg
Mounting: Wall mount (backplate fixed)
II. Operating Principle
The pressure medium enters the bellows, undergoing a pressure-to-displacement conversion;
This displacement drives the slider of the 140 Ω potentiometer, generating a resistance signal proportional to the pressure;
The controller panel allows for the setting of both the operating pressure and the proportional bandwidth, enabling continuous and smooth pressure modulation (non-switching type).
III. Typical Applications
Proportional control of boiler steam pressure;
Air pressure / airflow modulation in HVAC systems (fans, dampers, compressors);
Closed-loop pressure control for non-corrosive gases/liquids in industrial processes.
IV. Model Variations (L91 Series)
L91A: Single potentiometer, fixed proportional bandwidth;
L91B: Single potentiometer, adjustable proportional bandwidth (this model);
L91D: Dual potentiometers, synchronous motor drive, adjustable proportional bandwidth.
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