Safety Valve - WRS Dosing

KEEP YOUR SYSTEM IN CHECK

Safety Valve is one of the most crucial accessories in a chemical dosing system. It is also referred as pressure relief valve in the industry. Safety valve helps to prevent system being over pressure. In a typical setup, it shall be installed along the return pipeline after the metering pump. While installing a safety valve, it shall be installed as close as possible towards the dosing pump and there shouldn’t be any valve in between. When the pressure in the system pipeline exceeds the preset value, the diaphragm and the shaft are jacked up, and the medium is discharged back to the return pipe. The preset value can be adjusted directly on the safety valve itself. The preset value can be adjusted within 0 – 1Mpa by adjusting the adjustable nut. The relief pressure is generally set higher than the system pressure by 0.1-0.2Mpa and not exceeding the maximum pressure of the metering pump.

Back pressure valve is very similar to safety valve, but the emphasis is on steady state pressure control instead of on/off actuation. It shall be installed on the positive pressure side along the discharge pipe of the metering pump. A back-pressure valve can prevent the occurrence of siphoning and reduce unstable dosage which is caused by the pressure fluctuation. To adjust the set value, remove the protective cap, rotate the adjusting nut, and set within the range of 0-0.6 MPa. It is commonly used in conjunction with the pulsation damper to reduce the vibration damage towards the system. On the discharge, the flow will be more stable with the installation of back pressure valve.

GENERAL SPECIFICATIONS

Material	UPVC, PP, CPVC, PVDF, SUS304, SUS316;
Working Pressure	0~1.0MPa or 0~1.6MPa
Inlet/Outlet Size	DN15, DN20, DN25, DN32, DN40, DN50, DN65
Connection Method	Glue Union, Weld Union, Threaded, Flange, Hose Compression Fitting
Diaphragm	PTFE + Rubber

FEATURES

Ensure the system pressure is stable and consistent, prevents over pressurized your system.
Protect your pumps and ensure system stability.
Reduce flow fluctuation and protect your system from vibrations caused by the flow fluctuation.
Diaphragm is made of a combination of PTFE and Rubber. Designed to handle corrosive liquid and ensure top performance sealing without leakage.

SERIES 186 (STANDARD UNION CONNECTION)

Model	Size	L	H	D	d	z	h
18615	DN15	175	181	82	20	22	27
18620	DN20	174	181	82	25	19	29
18625	DN25	202	198	107	32	21	33
18632	DN32	251	198	107	40	31	35
18640	DN40	285	260	155	50	31	60
18650	DN50	355	260	155	63	39	60
18665	DN65	367	260	155	75	41	65

SERIES 186-F (FLANGE CONNECTION)

Model	Size	L	H	D	d	h
18615-F	DN15	128	181	82	95	27
18620-F	DN20	130	181	82	105	29
18625-F	DN25	158	198	107	115	33
18632-F	DN32	180	198	107	140	35
18640-F	DN40	220	260	155	150	60
18650-F	DN50	225	260	155	165	60
18665-F	DN65	238	260	155	185	65