A short KP 35 or KP 36 label does not identify the complete switch you will receive, and a headline price does not reveal whether GST, freight, warranty or the correct connection is included. By checking the pressure duty, ordering code, electrical load and quotation line items, you can choose the right model and compare Delhi supply offers without buying an unsuitable or untraceable variant.
Key takeaways
- Choose KP 35 for low-side pressure protection or control.
- Choose KP 36 for high-side control around 4–12 bar.
- Request the full Danfoss code, pressure range, connection and contact rating.
- Compare quotations using traceability, warranty, delivery and included accessories.
KP 35 versus KP 36: Which pressure switch matches the application?
Choose KP 35 for low-side protection or control; choose KP 36 for high-side control. Do not select by the KP label alone: a KP 36 high-pressure range is approximately 4–12 bar, while KP 35 covers the lower range and suits applications requiring low-pressure cut-in and cut-out control.
| Model | Pressure range and differential | Reset, contact and suitability |
|---|---|---|
| KP 35 | Approximately -0.2–7.5 bar; adjustable differential about 0.7–4.0 bar | Automatic reset version; SPDT changeover contact; low-pressure refrigeration or air-conditioning control |
| KP 36 | Approximately 4–12 bar; adjustable differential about 1.5–4.0 bar | Automatic reset version; SPDT changeover contact; high-pressure refrigeration or air-conditioning control |
The differential sets the gap between the pressure at which the contact changes state and the pressure at which it resets. A KP 35 set only by nominal range can still cycle the compressor incorrectly if its differential does not match the required cut-in and cut-out.
Both models use a single-pole changeover contact, so follow the terminal diagram and confirm whether your circuit needs normally open or normally closed operation.
Use these switches with the refrigerant or air service specified for the exact model, not as general-purpose pneumatic controls.
Check the datasheet for the permitted medium, contact rating, maximum working pressure and ambient temperature limits before installation; KP versions commonly use an operating ambient range around -40°C to 65°C, but the ordering code controls the final specification. A Danfoss KP pressure switch price is meaningful only with that complete code, connection and reset configuration.
How do you select the pressure setting and complete Danfoss code?
1. Write the operating pressures before selecting a code: cut-in, cut-out, differential and maximum working pressure. For a low-pressure compressor control, differential equals cut-in minus cut-out; for example, a 2 bar cut-in and 0.8 bar cut-out requires a 1.2 bar differential. Do not choose a setting simply because it falls inside the nominal scale.
2. Match the pressure range and scale to the application. A commonly specified KP 35 range is approximately −0.2 to 7.5 bar, with an adjustable differential of about 0.7 to 4.0 bar.
Ask the seller to state whether the scale is bar, bar/psi or another pressure unit, and confirm the maximum working pressure against the datasheet.
3. Specify the reset arrangement: automatic reset or manual reset. A manual-reset version changes how the compressor returns to operation after a pressure trip, so an automatic-reset switch is not an equivalent substitute.
4. Add the connection and electrical configuration to the request. State the pressure-port thread or flare connection, the required contact arrangement, voltage and contact load, then ask for the complete Danfoss ordering code rather than “KP 35” or “KP 36”.
5. Before you buy danfoss kp 35, request a nameplate or original-package photograph showing that code, plus serial or batch identification. Retain the invoice for traceability. A Delhi seller should also confirm stock, GST, delivery and warranty because connection and reset variants can change the quoted price.
What should a Delhi quotation include for KP 35 or KP 36?
A reliable quotation must price the exact ordering code, not just “KP 35” or “KP 36”. One generic model price is unreliable because connection, pressure scale, reset arrangement, stock age and electrical variants can change the item being offered.
Ask a Danfoss KP 35 dealer in Delhi or Danfoss KP 36 dealer in Delhi to provide:
- Exact Danfoss part number and quantity
- Basic unit price, GST rate and amount
- Freight or Delhi delivery charge
- Stock status: ready stock, incoming stock or indent
- Confirmed delivery date
- Warranty period and claim procedure
- Installation, testing or commissioning charge, stated separately
- Nameplate or original-packaging photograph before dispatch
| Quotation item | KP 35 offer | KP 36 offer |
|---|---|---|
| Exact ordering code | Written in full, including connection and reset variant | Written in full, including connection and reset variant |
| Price basis | Basic price plus GST, freight and any installation fee | Basic price plus GST, freight and any installation fee |
| Availability | Physical stock or supplier lead time | Physical stock or supplier lead time |
| Acceptance check | Nameplate must match the purchase order | Nameplate must match the purchase order |
| Traceability | Invoice plus serial or batch identification | Invoice plus serial or batch identification |
This is the information needed to compare danfoss kp 35 kp 36 price in delhi rather than marketplace headlines. Multitech Pneumatics And Hydraulics can be asked to record the code and delivery terms on the quotation, so an alternate-connection or older unit is not accepted under a short model name.
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Will the switch fit the pipework and control circuit?
It fits only when the pressure connection, sensing medium and control-circuit duty match the installation. A flare port is not interchangeable with a pipe-thread connection, and a refrigeration pressure switch is not automatically suitable for compressed air, water, oil or another industrial fluid.
Before installation, check:
- Match the supplied flare or pipe connection size, thread standard and gasket or flare requirement to the installed line. Do not force a mismatched thread.
- Confirm the refrigerant or fluid, oil compatibility and pressure units against the Danfoss datasheet. Stop if the seller cannot confirm media suitability.
- Compare the control-circuit voltage with the switch rating.
- Check contact current for the actual load, including compressor starting inrush, not only its running current.
- Follow the terminal diagram. KP switches use SPDT contacts; verify whether the circuit needs common-to-NO or common-to-NC operation at the required pressure.
- Check the enclosure protection, cable entry and terminal clearance against the mounting location.
- Compare the permitted ambient and media temperatures with conditions around the compressor and sensing line.
Use a contactor when compressor starting current exceeds the pressure switch contact rating. Use an interposing relay when the control voltage differs, the load is inductive, or electrical isolation is required. The pressure switch should then operate the relay or contactor coil, not carry the compressor motor current.
How can you verify the supplied unit and compare alternatives?
A Danfoss KP 35 or KP 36 cannot be authenticated from the short model name alone. Match the delivered item to the quoted ordering code, then retain the invoice and identification marking for warranty and traceability.
Check these points before installation:
- Packaging: look for intact factory seals, readable Danfoss labelling and a label matching the quoted code.
- Nameplate: confirm KP 35 or KP 36, pressure units, electrical rating and connection information.
- Model code: verify pressure range, port type, reset arrangement and electrical configuration.
- Serial or batch marking: photograph it and ensure it is legible, not altered or covered by a replacement label.
- Adjustment scale: confirm the scale is printed clearly and its range matches the order.
- Terminals: compare the terminal diagram with the switch; the KP uses a single-pole changeover contact, so identify common, normally open and normally closed terminals.
- Seals: reject damaged housing seals, missing cover screws or evidence of tampering.
| Option | Accuracy and adjustment | Wiring and maintenance |
|---|---|---|
| Mechanical KP switch | Switching occurs at adjustable pressure points; set it with the scale and verify during commissioning. | Simple changeover wiring; inspect contacts, settings and sensing connection. |
| Pressure transducer | Provides a continuous pressure signal and finer monitoring when paired with suitable controls. | Requires power and signal wiring; troubleshoot sensor, cable and controller together. |
| Electronic controller | Offers programmable differential, alarms and display-based adjustment. | More wiring and configuration; protect electronics and retain settings. |
| Other mechanical switch | Compare range, differential, reset and contact rating directly. | Similar wiring, but replacement parts and calibration procedures differ. |
Frequently asked questions
Which application suits Danfoss KP 35 versus KP 36?
Choose KP 35 for low-side protection or control where low-pressure cut-in and cut-out settings are required. Choose KP 36 for high-side control; its high-pressure range is approximately 4–12 bar.
How do you select the pressure setting and complete Danfoss code?
Define the required cut-in and cut-out pressures, reset arrangement, refrigerant or system duty, pressure connection and electrical contact configuration. Ask the supplier to confirm the complete Danfoss code against those requirements.
What should a Delhi quotation include for KP 35 or KP 36?
Request the exact model code, pressure range, connection size, contact rating, stock status, delivery time, GST treatment, warranty terms and any included mounting or connection accessories.
Will the switch fit the pipework and control circuit?
Check the pressure connection and thread against the existing port, then verify the switch contact rating, voltage, terminal arrangement and required cut-in or cut-out sequence before installation.
How can you verify the supplied Danfoss pressure switch?
Match the model and code on the unit and packaging with the quotation, inspect the seal and condition, request traceability documents, and compare the stated pressure range and connections with your order.
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