IMI TA Hydronics kapiliarinis vamzdelis 1.5m
- Purpose: hydraulic pressure signal transmission to the DA-616 diaphragm
- Length: 1.5 m — standard, suits most installation cases
- Compatibility: full DA-616 series (DN15, DN20, DN25, DN32)
Where the capillary tube is used
The DA-616 differential pressure controller operates hydraulically — it requires two pressure signals: from the beginning of the consumer branch (high-pressure side) and the end (low-pressure side). This signal is transmitted through the capillary tube, which connects the regulator diaphragm to the controlled branch point. Without the capillary tube, DA-616 will not function as a Δp regulator — it stays a plain flow valve.
Technical specifications
| Parameter | Value |
|---|---|
| Code | 52-850-915 |
| Series | IMI TA Hydronics |
| Type | Capillary (impulse) tube for Δp regulators |
| Length | 1.5 m |
| Material | Copper tube (verify in IMI catalogue) |
| Compatibility | DA-616 series (DN15, DN20, DN25, DN32) |
| Connection | IMI standard capillary fitting |
| Temperature range | Matches DA-616 (up to 120 °C) |
When to choose this accessory
- Ordering a new DA-616 regulator — the accessory is not included in the valve pack
- Replacing an old capillary (fracture, seal failure, corrosion)
- System reconfiguration when the regulator position must move
If a longer capillary is required (1.5 m insufficient) — contact us, we will supply the alternative length available in the IMI catalogue (2 m, 3 m or similar).
B2B delivery and logistics via Amegata.lt
- 24-hour delivery across the EU (from our warehouse in Vilnius)
- Competitive B2B pricing — often below market average
- 30-day payment terms for companies (per contract)
- Free technical consultation on regulator and accessory kits
Official IMI Hydronic catalogue: imi-hydronic.com
Frequently asked questions
Can an old capillary tube from another regulator be reused?
Technically — sometimes yes, if the system matches and threads are identical. In practice — not recommended: an old tube may have corrosion, deformations or leaks that compromise Δp control accuracy.
What happens if the capillary tube blocks?
DA-616 stops "seeing" the pressure signal — either fully (spring closes fully) or partially (oscillation). Symptoms: the heating branch is too hot / too cold, or temperature keeps changing. Fix — check capillary integrity and flow, replace if needed.
Does the capillary tube carry pressure?
Yes, the capillary transmits working pressure (up to 16 bar) but with no flow. Simpler than a flow pipe — but still requires PN 16 class sealing.
Can it be used with other manufacturers' Δp regulators?
No. The capillary tube is specifically designed for IMI TA Hydronics DA-616 connections. Other regulators (e.g. Danfoss AVP, Sauter, Oventrop) require the manufacturer's own original accessories.
