“Telelin” make high accuracy, clear acrylic plastic body rotameter uses tapered tube drilled directly in acrylic plastic body itself, acrylic plastic is highly stabled, chemical resistant and gives glass like clearness which enables clear visualization of flow. In Acrylic Body rotameter, Flow range is calibrated, engraved and coloured with black on body itself for long lasting durability. Acrylic body rotameters are generally used for Air, Water and Gases. 

Temperature Rating : 50 oC Max 

Pressure Rating : 10 Kg/cm2 Max 

Accuracy : +/- 2% Full Scale Range 

Models Available : 

PB-797 FL, .……………FL=Flanged End Connections at bottom and top 

PB -797 FLS, ………….FLS=Flanged Connection at Side or at Rear 

PB -796 SC, …………...SC=Screwed End Connection at bottom and top 

PB -796 SCS, ………….SCS=Screwed End Connection at Side or at Rear

Telelin makes By-Pass Type Rotameter Complete Assemblies are recommended for large flows in 2” & above size pipe lines, where direct on-line Rotameter is not possible for becoming very costly due to non availability of required dia. Tube or large dia. Tube respectively. Assembly consists of 

a) A pair of 38mm thick orifice flanges with ½” BSP female pressure tapings 
b) A precisely bored & finished orifice plate 
c) Necessary by-pass piping 
d) 2 Nos. Isolating valves 
e) A rotameter in By- Pass line with range orifice plate. All items assembled together as shown in Pic. 1 & 2 above MOC as required by fluid / client. By pass piping design (position) differs for vertical installation & horizontal Installation. 

Details required for submitting offer :   

a) Piping position / Flow direction i.e. vertical: Upward / Downward. Horizontal : Left to right or right to left 
b) Line size, exact I.D. & O.D. or Pipe schedule 
c) Fluid Name, OP. Temp, OP. Pressure, OP. SP. GR. / Density, OP. Viscosity 
d) Minimum & Maximum Flow, Special details if any.

Telelin make High accuracy digital metal tube rotameters are used in place of glass tube rotameters wherein there is high pressure and high temperature in the line which glass tube rotameter cannot withstand. This magnetic flow meter uses magnetic float which is detected by highly sensitive magnetic field detection sensor which enables to show digital readout. This flow meter does not require any electrical connection, as it operates on replaceable battery. This flow meter has in built two wire transmitter i.e 4-20 mA output. 

Ranges Available : From 0.2 to 150 m 3 /Hr (Water Flow) From 6 to 4500 Nm 3 /Hr (Air Flow) 

Accuracy : +/- 2% of Full Scale Range. Range Ability : 10 : 1 

Temperature Rating : -50 to 120 o C 

Pressure Rating : 70 Kg/cm 2 

Enclosure : Flameproof/Weatherproof 

Line Size : from 15 NB to 150 NB 

Power Supply : 9 VDC Battery 

Optional : Flow totalizer inbuilt or external can be provided on request.

“Telelin” make high accuracy Gang Rotameters i.e A Gang of 4 to 5 Rotameters or more as required are used for batching purpose and used by valve manufacturers for testing of leak in various line sizes of valves manufactured by them. This rotameter can be easily carried on for the field purpose can be provided with common or individual inlet and outlet as desired with flow control valve at entry point individually or common. This rotameter can be provided in acrylic body or glass tube (In a Gang) mounted in a single casing. 

Models Available : 

GT-800
(Gang of Glass Tube Rotameter) 

PB-800 
(Gang of Plastic Body Rotameter) 

GT-PB-800 
(Gang of Plastic Body and Glass Tube Rotameter)

“Telelin” make high accuracy fully enclosed online direct reading glass tube rotameters are relatively simple and reliable instruments for continuous flow rate indication. This rotameters consists of a vertical mounted, calibrated tapered tube with float inside and a scale directly calibrated as per flow range taking into account operating Sp. Gr. /Density and operating viscosity. Your line fluid raises the float in tapered glass Tube, Area increases as float moves upward thereby showing the exact (Increasing) flow. 

Accuracy : +/- 2% Full Scale Range 

Mounting : Vertical with Bottom inlet i.e Mounting In Upward Vertical Flow line 

MOC : M-S / 304 S.S / 316 S.S / P.P / PVC / PTFE or as required 

Models Available : 

GT-797 FL,
FL=Flanged End Connections at bottom and top 

GT-797 FLS, 
FLS=Flanged Connection at Side or at Rear 

GT-797 SC, 
SC=Screwed End Connection at bottom and top 

GT-797 SCS, 
SCS=Screwed End Connection at Side or at Rear

“Telelin” make high accuracy, clear acrylic plastic body Low Flow rotameter uses tapered tube drilled directly in acrylic plastic body itself, acrylic plastic is highly stabled and chemical resistant and gives glass like clearness which enables clear visualization of flow. In Acrylic Body rotameter, Flow range is calibrated, engraved and coloured with black on body itself for long lasting durability. Acrylic body Low Flow rotameters are generally used for Purging and used for chlorination of Gases. 

Temperature Rating : 50 oC Max 

Pressure Rating : 5 Kg/cm 2 Max 

Accuracy : +/- 2% Full Scale Range 

Mounting : Wall Mounting, Front of Panel Mounting with help of screwed mounting lugs, Direct Mounting. 

Models Available : 

PB-715 
(With Flow Control Valve at entry point and connections at rear) 

PB -725 
(Having 304 S.S /316 S.S Material top & Bottom Blog and Flow Control Valve at entry Point in bottom block) 

PB -755 
(Top & Bottom Connections of M/F Screwed, Without Flow Control Valve)

“Telelin” make high accuracy fully enclosed Low Flow glass tube rotameters/purge rotameters are relatively simple and reliable instruments for continuous flow rate indication. This rotameter consists of a vertical mounted, calibrated tapered tube with float inside and a scale directly calibrated as per flow range taking into account operating Sp. Gr. /Density and operating viscosity. Your line fluid raises the float in tapered glass tube, Area increases as float moves upward thereby showing the exact ( Increasing) flow. This flow meters are provided with/without flow control valve at entry point. 

Accuracy : +/- 2% Full Scale Range 

Casing : Aluminum Casing from 3 sides and clear acrylic front 

Mounting : Wall Mounting, Front of Panel Mounting with help of screwed mounting lugs, Direct Mounting. 

MOC : M-S / 304 S.S / 316 S.S / P.P / PVC / PTFE or as required 

Models Available : 

GT-777 R/TB 
( Having Flow Control Valve at entry point and connections at rear or Top and Bottom ) 

GT-771 R/TB 
( Without Flow Control Valve and having connections at rear or Top and Bottom ) 

GT-785

Salient Features

• Ideal for both clean and opaque liquid flow measurement
• High accuracy 1.0% reading
• Bi-directional measurement. Totalizer display for net, positive and negative flow
• Easy and economical installation, No pipe cutting
• Wide measurement range 0 ~ 12m/s
• Wide pipe size range (DN 12 ~ 4570mm)
• Cost effective and Versatile
• Suitable for all commonly used pipe materials
• Non invasive, No moving parts, No pressure drop, No maintenance

Applications

• Water and waste water management
• Chemical, Petrochemical and Process Industries                                 
• Fertilizer Industries
• Mining Industries
• Pharmaceutical Industries      
• Sugar, Beverage Industries                  
• Paper and Pulp Industries
• Dredging Industries
• Food and Drug Industries

“Telelin” Air Purge Rotameters Consisting of :

•  Tee Shape drop pipe, Material 304 S.S 

•  3 LPM, Air Plastic Body Rotameter with Flow Control Valve for purging 

•  Single limb well type manometer, Wall mounting type generally as per our model No. SW-312 Hg. With 304 S.S Material wetted parts. 

•  Connection Hose pipes to complete connection of all 3 above. 

DETAILS REQUIRED FOR SUBMITTING OFFER. 

1) Tank Height 
2) Liquid Details 
3) Purging Gas Detail 
4) Quantity 
5) Special Details if any

Salient Features

• Ideal for both clean and opaque liquid flow measurement
• High accuracy 1.0% reading
• Bi-directional measurement. Totalizer display for net, positive and negative flow
• Easy and economical installation, No pipe cutting
• Wide measurement range 0 ~ 12m/s
• Wide pipe size range (DN 12 ~ 4570mm)
• Cost effective and Versatile
• Suitable for all commonly used pipe materials
• Non invasive, No moving parts, No pressure drop, No maintenance

Applications

• Water and waste water management
• Chemical, Petrochemical and Process Industries                                 
• Fertilizer Industries
• Mining Industries
• Pharmaceutical Industries      
• Sugar, Beverage Industries                  
• Paper and Pulp Industries
• Dredging Industries
• Food and Drug Industries

When fluid or gas flows through a taper tube containing a float, a pressure difference of P1 and P2 is created between upper and lower side of the float. The float moves upwards by a force obtained by multiplying the pressure differential by the maximum cross sectional area of the float. 

Due to taper tube, as the float moves upwards, the fluid passing area increases as a result of which the differential pressure decreases. Upward movement of float stops when the dead load is dynamically balanced by the differential pressure. Tapering of metering tube is so designed that the vertical movement of the float becomes linearly proportional to the rate of flow and the scale is provided to read the position of the float, thus giving birth to flow rate indication. 

Based on Bemoulli's theorem, the principle mentioned above can be theoretically expressed as follows. 

FLOW FORMULA 

 
Where 

•  Q = Volumetric flow rate 
•  V = Volume of Float 
•  C = Flow coefficient 
•  Af = Maximum pressure receiving area of float. 
•  A = Fluid passing Area 
•  P = Float Density 
•  g = gravimetric acceleration 
•  y = Fluid Density 

There are various types of flow meters available namely : 

•  GLASS TUBE ROTAMETERS 
•  BY-PASS ROTAMETER COMPLETE ASSEMBLIES 
•  PLASTIC BODY ROTAMETERS GANG / MULTIPLE ROTAMETERS 
•  METAL TUBE ROTAMETERS WITH DIGITAL FLOW RATE INDICATION 
•  ROTEMERS AS PER SAMPLE & OR DRAWING 
•  METAL TUBE ROTAMETER WITH TRANSMITTER 
•  i.e. 4-20 mA output & DIGITAL TOTALISER 
•  ( OPERATING ON 4-20mA OUTPUT)