# Pressure differential regulator Herz 4002 DN32

**URL:** https://aio.lv/en/product--herz-1400244--11785099
**Data updated:** 2026-03-08 22:56 (EET)
**Category:** Heating Radiators
**Manufacturer:** Herz
**Manufacturer code:** 1400244
**EAN:** 9004174454301
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 236.99 €
**Prices and availability valid until:** 2026-07-17 23:59
**Price without VAT (21%):** 195.86 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--herz-1400244--11785099

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Herz pressure differential regulator model 4002 with nominal diameter DN32. Designed to maintain a constant pressure difference in hydronic heating and cooling systems, it ensures stable flow and protects valves and control devices from pressure fluctuations. Suitable for balancing circuits, commissioning, and improving system stability in residential and commercial installations.

## Long description

The Herz 4002 DN32 pressure differential regulator is designed for hydronic heating and cooling systems to maintain a stable preset differential pressure across circuits. It automatically compensates for pressure fluctuations caused by pump speed changes or valve adjustments, ensuring consistent flow to radiators, convectors and control valves. The compact DN32 body and direct-acting control element enable straightforward integration into residential and commercial installations where differential pressure control and hydraulic balancing are required.
Advantages
The regulator provides automatic pressure stabilization without external power, reducing the risk of noise, valve hunting and system imbalance. Constructed for compatibility with standard pipework, it helps protect thermostatic and motorized control valves from pressure spikes and ensures predictable actuator behavior. The device is designed for low maintenance operation and contributes to improved system efficiency by maintaining stable flow rates under varying load conditions.
Suitable for
 Hydronic heating circuits in apartments, houses and light commercial buildings
 Cooling systems with variable pump speeds
 Balancing and commissioning of distribution manifolds and risers
 Protection of thermostatic, zone and motorized control valves
Key specifications
 Nominal diameter: DN32
 Function: maintenance of constant differential pressure
 Operation: direct-acting mechanical regulator (no external power required)
 Suitable media: water and glycols in typical HVAC concentrations
 Typical applications: heating and cooling circuits, balancing tasks
How to use
Install the regulator in the return or feed line at the location recommended by the system designer, observing flow direction marking. Set the required differential pressure according to system design parameters; adjustment is typically performed using the built-in actuator or screw provided. After installation, purge air from the circuit and verify correct operation by observing stable flows and steady actuator response across load changes. Commission the system following standard hydraulic balancing procedures to ensure correct distribution.
Usage recommendations
Choose the preset differential pressure based on pipe sizing and valve characteristics, and check compatibility with heat-transfer fluids used in the system. Regularly inspect for tightness and correct operation during scheduled maintenance intervals; ensure strainers and filters upstream are clean to prevent particulate damage.

## FAQ

### How much does the Herz pressure differential regulator 4002 DN32 cost, and is it available for purchase?

The price is 236.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Herz pressure differential regulator 4002 DN32 be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Herz products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Herz service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

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