Rhodes 400B Sight Glass with Ball Indicator

The Altecnic / Caleffi 309 Pressure & Temperature Relief Valve - 309473CST is designed to effectively control and limit the temperature and pressure of hot water in domestic storage heaters. This essential safety device prevents water temperatures from exceeding 100°C, thereby eliminating the risk of steam formation. When the system reaches predetermined pressure or temperature thresholds, the valve discharges a sufficient amount of water into the atmosphere, ensuring that both temperature and pressure are maintained within safe operating limits. The valve's mechanism operates as follows: - **Temperature Control:** As the temperature in the storage heater rises, the thermostat compound within the temperature sensor, which is submerged in hot water, expands. This expansion causes a thrust pin to move, actuating the obturator and opening the valve. The valve is set to activate at temperatures exceeding 90°C. - **Pressure Control:** When pressure limits are reached, the obturator, which is opposed by a set spring, lifts and fully opens the outlet. The pressure setting is specifically configured according to the maximum allowable pressure within the system. As temperature and pressure subside, the valve automatically re-closes within designated tolerances.

Specifications

Size: 1/2"
Connections: Male x Ø 15 mm with compression fitting for copper pipe
Materials: DZR
Medium: Water
Set Pressure: 7 Barg
Discharge Rating: 10 kW
Temperature Setting: 90 degC
Probe Length: 97mm
Product Code: 309473CST
Notes: WRAS approved, CE marked

The ARI STOBU Stop Valve, commonly referred to as a Crown Valve, is an essential component fitted to steam boilers, designed to effectively isolate the boiler steam from the associated processes or plant systems. Its name arises from its typical position at the top or "crown" of the boiler. The ARI STOBU Stop Valve is renowned for its reliability and performance in this crucial application.

Sizes: DN15 - DN100
Connections: Flanged PN40
Materials: Cast Steel (1.0619) body, stainless steel internals, graphite packing
Temperature: Max 180°C
Notes: Available in straight pattern or angle pattern.

The Altecnic / Caleffi Relief Valve - Circlip Inlet - F0000477 is a vital component for domestic hot water systems. Designed to protect hot water cylinders and heating systems, this valve ensures the safety of boilers and related components. It is specifically chosen based on the required set pressure. When the pressure increases and reaches the predetermined discharge pressure, the valve automatically opens, releasing excess pressure into the atmosphere. This function helps to prevent potentially dangerous pressure levels within the system, thereby safeguarding both the boiler and the hot water storage cylinder, as well as ensuring the safety of nearby personnel.

**Product Specifications**

• **Materials:** Brass
• **Set Pressure:** 4.5 Barg
• **Product Code:** F0000477
• **Notes:** Compatible with MK3 Caleffi Multibloc

Improve the safety of your domestic water system with the Altecnic / Caleffi Relief Valve, providing dependable performance and peace of mind.