Watson Smith R27 Manually Operated Manostat 301300R

Watson Smith R27 Manually Operated Manostat 301300R

Industry:

Railway Pantograph system and Trams

Solution:

The Manostat controls the vertical pressure between the pantograph and the cable.

This requires rapid operation (high flow) as well as stability across a wide temperature range

Watson Smith R27 Manually Operated Manostat 301300R

TECHNICAL DATA

Pneumatic

•Output Signal See ordering information - Pressure range can be limited by resetting the locknuts provided

•Air Supply Oil free, dry air or other dry gases, filtered to better than 25 microns; at least 0.2bar (3psig) above

output pressure to a maximum of 10bar (150psig, 1000kPa)

•Flow Capacity Up to 300Nl/min (10scfm).

•Air Consumption 0.2 l/min (0.006scfm) at 1bar (15psig);

0.3 l/min (0.01scfm) at 1.7bar (25psig);

0.6 l/min (0.02scfm) at 4bar (60psig);

1.2 l/min (0.04scfm) at 8bar (120psig) (typical values at maximum supply pressure)

•Response Time less than 0.2 seconds for 50% load change

•Regulation % output change for 1bar/15psi supply Accuracy pressure change at mid-range output: 0.1%

(0.14bar/2 to 25psi), 0.05% (0.14-4bar/2 to 60psi), 0.02% (0.14-8bar/2 to 120psi)

•Sensitivity Better than 0.3mbar (0.005psi)

•Hysteresis and Typically less than 0.05% setting at mid-range

Repeatability

•Temperature Typically better then 1% change of full span between -20C and +70C

Effect

•Connections 1/4” NPT female standard (plus two integral 1/4” NPT gauge ports); others on request

Physical

•Operating Temperature -20C to +70C

•I.P. Rating IP65

•Vibration The unit is unaffected by moderate vibration

•Material of Construction Zinc diecasting passivated and epoxy painted, Beryllium copper capsule; Nitrile diaphragms

Model Types

•Handwheel: Basic manostat unit with pressure adjusting handwheel; mounting in any attitude, integral mounting nutsupplied

•Dial manostat: Manual pressure loading unit combining a manostat regulator with a 4” diameter gauge

•DIN manostat: As above but with a DIN standard pressure gauge

•DMW: Weatherproof version of dial manostat with 100mm diameter gauge; pneumatic connections taken to lower face of casing; surface or post mounting (yoke supplied suitable for a 50mm/2” diameter post);casing is polycarbonate, grey finish to IP55

Volume Boosting Air Relay (manual bias):

Remote control of regulated pressures is possible with minimal air usage; positive or negative bias

between pilot signal and regulated pressure can be set up of up to 2bar/30psig

Note: a small pressure (<2psig, 0.14bar) will show at the lower end of dial manostats gauge scale (due to regulator

servo operation)

Manual bias relay

Output pressure Order code

0.2-1bar, Standard 220100R

3-15psig

0.14-8bar, Standard 220400R

2-120psig

Non extensive list of available models (all of the following are suitable replacement units for model starting with "53"): 100200R, 10024XR, 10025XR, 10026XR, 10044XR, 10045XR, 100300R, 100400R, 13009XR, 160300R, 200400R, 220400R, 240100R 300100R, 301200R, 301300R, 301400R, 309000R, 309100R, 31001XR, 31003XR, 310100R, 311200R, 311300R, 311400R, 319000R, 319100R, 329000R, 5310R0300R,5310R0200R