Z-Tide Valves

Z-Tide Valves Industrial Co Ltd have been engaging in various types of valve production for over 30 years. In the past, the companies business was concentrated at strong well established export customers with a strong focus on research and development. 

At the start of 1991 specialist machinery and digital CNC machines were purchased and installed which have enabled Z Tide Valves to obtain very high levels of precise quality control through a well established foundation of valve manufacturing, quality machinery and expertise. With years of accumulated manufacturing experience from on site valve production, Z tide are able to continually cultivate their talents to achieve better performance through innovative design to exceed industrial demands.

It is Z-Tide expectation that industry may purchase the highest quality products at very competitive prices. At this present time Z Tide and Elite Line manufacture pressure sustaining valves, pressure reducing valves, pilot float valves, pump control valves, multi-function control valves, direct acting pressure control valves, water hammer arrestors, silent check valves and solenoid operated valves which have been acknowledged and patented worldwide.

Z-Tide success has been seen in fire protection systems, air-conditioning systems, water supply systems and many processing factories around the world.

Valves Manufactured by Z-Tide.

BF Pilot Multi-Function Axial Flow Control Valve

The BF series multi function high flow axial control valves offer pressure reducing, pressure sustaining, pressure relief, level control and solenoid operation from a single main valve design by means of a sub base mounted controller or pilot regulator.

Benefits of the BF series multi function valve.

1. 1. Removes the complicated and fragile external pipework often seen on diaphragm valves, reducing the space required for installation and greatly simplifying maintenance. Installation is greatly simplified through the reduced envelope dimensions and weight to enable fitting in tighter spaces with less emphasis on pipe weight, valve support methods and fragile external pipework.

1. 2. Changing the function of the valve from a Pressure Reducing Valve (PRV) to pressure sustaining valve or Back Pressure Valve (BPV) is a simple matter of removing and exchanging the pilot pressure regulator for a sustaining regulator.

1. 3. High flow - Conventional diaphragm globe valves force media to change direction several times whilst passing through the valve, contributing to pressure loss and limiting flow through a convoluted in and up to diaphragm over the seat and back down though and out whereas the BF axial valve allows a radial flow around an axial seat and spring case, passing straight through the valve with very little deviation to flow direction, maximising velocity and reducing pressure loss. The axial design gives higher smoother flow through the valve for any given line size for size compared to any globe valve.

1. 4. Increased reliability as there is no diaphragm or rupture or tear as sealing is with U ring piston sealing, the axial design offers significantly reduced turbulence compared to a globe valve which results in higher smoother flow through the valve for a given line size.

The Z Tide BF multifunctional valves are available in cast iron, epoxy coated ductile iron, 304 and 316 stainless steel construction with flanges PN16 or ANSI150Lb from 2" to 12" as standard with larger sizes up to DN1000 40" available upon request.

Special variants include a UL listed pressure reducing valve rated to 300psi in sizes 3" DN80 through to 8" DN200 for fire suppression systems and WRAS certified pressure reducing valves in stainless steel from DN50 to DN150. These axial high flow valves are complimented by WRAS approved direct operated pressure reducing valves in stainless steel CF8M, from 1/2" to 2" thread and DN15 to DN150 PN16 flange.

Pressure Reducing Valve (BFR)

BFR Reducing Valves are designed to prevent pipeline and system damage due to system over pressure. Pressure reducing valves are installed in water and fluid supply pipelines and maintain a stable pre-set (manually adjustable) outlet pressure regardless of pressure changes at the valve inlet. Pressure gauge shows downstream reduced pressure.

Pressure Sustaining Valve (BFS)

BFS Sustaining valve (Back pressure valves) are utilised when installing process and water pipework systems. The pressure sustaining valve primarily maintains a pre-set (manually adjustable) upstream or back pressure regardless of down stream flow demands, keeping upstream pressures above pre-set minimum requirements so that other processing equipment is not starved. Pressure gauge shows sustained back pressure.

 Pressure Relief Valve (BFL)

BFL Relief valve is deigned to stay closed until the system pressure reaches a set maximum pressure at which point the pressure relief valve it will open quickly instantly releasing the excess pressure downstream, when the system pressure drops below the valve pressure setting the BFL pressure relief valve will carefully close to protect the pipeline system from water hammer. Pressure gauge shows system pressure.

Solenoid Operated Valve (BFE)

BFE Electric solenoid control ON/OFF or Open or Closed solenoid valve. This solenoid controlled valve utilises the system pressure differential to open or close the internal piston thus opening or closing the main solenoid valve. This differential pressure (difference between inlet and outlet pressure) must typically be a minimum of 0.3 Bar. This pressure difference is then controlled by the external pilot circuit solenoid control valve and can be over ridden into the open position by the manual over ride lever ball valve. When the pilot solenoid is de-energised and the control circuit closed, the back pressure causes the main valve piston to close and stay closed. When energised the pilot solenoid valve opens releasing the pilot pressure downstream this in turn allows the system pressure to open the main solenoid valve piston thus opening the solenoid valve and allowing flow of  media.

Float Valve (BFF)

BFF Float valve is designed to offer mechanical water level control for any water tank. Used in conjunction with a FBV float ball valve the tank water level can be maintained and adjusted mechanically simply by connecting the BFF to a mains water supply with outlet into tank and the float ball valve connected by a single pipe to the main valve pilot (typically 1/2" thread) as seen on top of cylindrical valve body.

when water level drops the float valve opens releasing water pressure from the main valve which in turn opens refilling the water tank. As water level rises the float ball valve closes and the back pressure causes the BFF valve to close.

BFR1000 40" Water pressure reducing valve

2 pieces DN1000 (1 meter bore, DN1000 or 40") Ductile Iron epoxy coated BFR1000 water pressure reducing valves bound for the 2012 Egypt water project.

When installing a fresh water damn or building a water reservoir the increased height relates directly to the increase in water pressure. For example a water reservoir 100 meters high will generate 9.8 bar of water pressure, 200 meters will give 19.613 bar etc. It is a common problem that the height of the water reservoir or dam will generate excessively high water pressure and thus the water pressure will need to be reduced to a safe level whilst maintaining good flow.

The BFR pressure reducing valve is ideally suited to this application and is able to mechanically reduce the water pressure to a pre-set level without the need for any electrical supply or complicated pipework system. Additionally due to this valve design is can be easily adapted to be a DN1000 pressure relief valve, pilot float valve or pressure sustaining valve.

AIF Anti Water Hammer Valves

Water hammer arrestors are designed to absorb water hammer pressure surges caused by sudden changes in water demand generally caused by system pump activation or switch off and excessive water velocity changes due to demand or system valve operations. The AIT and AIF valves are fitted with an internal diaphragm that is pneumatically pressurised via an external valve to 10% above the maximum water system pressure. In this way the anti water hammer valve acts as a shock absorber.

Pressure gauge shows internal air pressure.

Direct Acting Pressure Reducing Valves (PRV)

Pressure Reducing Valve RET & REF 1 to 13 Bar

RET threaded & REF flanged Pressure Reducing Valve (PRV), Body 316 Stainless steel, Seals Viton, NBR or PTFE, Pressure Inlet 25 Bar, Outlet ranges 1 to 5 Bar, 4 to 10 Bar or 8 to 13 Bar, Port sizes 1/2", 3/4", 1", 11/2" or 2" BSP / NPT thread or DN15 to DN150 Flange. This Direct Acting WRAS approved Pressure Reducing Valve (DAPRV) for air, water, RO ; Pure or Demin Water and other fluids or gases. The pressure balance design is not influenced by unstable fluctuating inlet pressures and will

maintain a constant stable downstream outlet pressure. Outlet pressure displayed by pressure gauge. UH ring sealing and diaphragm offering greatly improved pressure regulation, control and reliability. Special options up to 40 bar available, Temperature Range -15°C to +80°C.

Low Pressure Reducing Valve RELT & RELF 0.2 to 1.5 Bar.

RELF flanged & RELT thread Low Pressure Reducing Valve (PRV), Body 316 Stainless steel, seal Viton, NBR or PTFE, Pressure Inlet 10 Bar, Outlet Range 0.2 to 1.5 Bar, Port sizes 1/2 to 2" Thread or Flange DN15 to DN50 PN16 or ANSI150lb. The RELF & RELT are Direct Acting Low Pressure Reducing Valve (DAPRV) suited for water, RO; Pure and demin water, air,oil, gas and fluid media. The pressure control gate is a balanced-pressure design with a large diaphragm offering highly sensitive and accurate pressure control, which will not influence the pre-set outlet pressure caused by unstable and fluctuating inlet pressures and will maintain a precise and constant stable downstream outlet pressure that is displayed by the external pressure gauge. The design of the RELF/RELT piston UH Ring sealing and large diaphragm offers greatly improved pressure regulation and control.

Micro Pressure Reducing Valve REMT & REMF 0.03 to 0.15 Bar. 

REMT threaded and REMF flange Micro Pressure Reducing Valve (PRV), Body 316 Stainless steel, seals Viton, NBR or PTFE, Pressure Inlet 10 Bar, Outlet Range 0.03 to 0.15 Bar, Port 1/2 to 2" thread or flange DN15 to DN50. The REMT & REMF are Direct Acting Micro Pressure Reducing Valves suitable for RO; Pure and Demin water, oil, air, gas and fluid media. The pressure control gate is a balanced-pressure design with an extended diaphragm offering extremely sensitive and very accurate pressure reducing control, the pre-set outlet pressure is not influenced by any unstable and fluctuating inlet pressure and the outlet pressure will maintain at a precise and stable downstream outlet pressure which is displayed by the external pressure gauge. The design of the REM piston UH Ring sealing and large diaphragm offers greatly improved pressure regulation and control

Direct Acting Pressure Sustaining / Back Pressure Valves (BPV)

Pressure Sustaining Valve RFT & RFF 1 to 10 Bar

RFT threaded & RFF flanged Pressure Sustaining Valve / Back Pressure Valve (BPV), Body 316 Stainless Steel, Seals Viton, NBR or PTFE, Pressure 1 to 5 Bar or 4 to 10 Bar is a  Direct acting Pressure Sustaining Valve or back pressure valve (DABPV), Port sizes RTF 1/2 to 2" BSP or NPT Thread and RFF flange sizes DN15 to DN50. Pressure sustaining valves are designed to maintain a pre-set back pressure, if the back pressure drop the valve will begin to close to retain pressure, when pressure returns the valbe will begin to open again. Constructed from 316 stainless steel and is suitable for pure water, water, air, oil, fluid or gas media. Temperature Range -15ºC to +80ºC, Pressure gauge indicates the sustained back pressure (Upstream pressure).

Low Pressure Sustaining Valve RFLT & RFLF 0.2 to 1.5 Bar.

 RFLF flanged & RFLT thread Low Back Pressure or Pressure Sustaining Valve (BPV), Body 316 Stainless steel, seal Viton, NBR or PTFE, Pressure 0.2 to 1.5 Bar, Port sizes 1/2 to 2" Thread or Flange DN15 to DN50 PN16 or ANSI150lb. The RFLT RFLF sustaining valve all stainless steel construction makes it suitable for most water, RO water, Pure water, demin water, air,oil, gas and fluid media. The pressure controller is based on a large pressure balanced diaphragm design offering highly sensitive and accurate back pressure control with the current sustained pressure displayed by the external pressure gauge. When the inlet pressure changes due to downstream demand the large pressure control chamber design allows the RFLT pressure-sustaining valve to respond quickly to very accurately to maintain the pre-set pressure. The design of the RFLT piston UH Ring sealing and large diaphragm offers greatly improved pressure regulation and control.

Micro Pressure Sustaining Valve RFMT & RFMF 0.02 to 0.2 Bar. 

REMT threaded and REMF flange Micro Pressure Reducing Valve (PRV), Body 316 Stainless steel, seals Viton, NBR or PTFE, Pressure Inlet 10 Bar, Outlet Range 0.2 to 0.02 Bar, Port 1/2 to 2" thread or flange DN15 to DN50. The REMT & REMF are Direct Acting Micro Pressure Reducing Valves suitable for RO; Pure and Demin water, oil, air, gas and fluid media. The pressure control gate is a balanced-pressure design with an extended diaphragm offering extremely sensitive and very accurate pressure reducing control, the pre-set outlet pressure is not influenced by any unstable and fluctuating inlet pressure and the outlet pressure will maintain at a precise and stable downstream outlet pressure which is displayed by the external pressure gauge. The design of the REM piston UH Ring sealing and large diaphragm offers greatly improved pressure regulation and control.

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