Penstock / Sluice Gate


General Description

ESAREKA’s SERIES 10 fabricated Penstock / Sluice Gate is a highly versatile flow control gate with various types of mountings.

Adaptable to different applications, the Series 10 can be designed to withstand seating and unseating heads of up to 18m. When required, the Series 10 can be designed for higher water heads. The seal design keeps the allowable leakage rate to 0.60 l/min per meter of seating perimeter for seating head conditions. The unseating head leakage is 1.25 l/min per meter of perimeter for 6m water head. Over 6m of unseating head, the leakage is corrected at a rate of 0.03 l/min per meter of perimeter for each additional meter over 6m. The leakage rate is 50% of the maximum allowable leakage recommended by AWWA/BS7775.

It is available in sizes from 150mm up to 3000mm. For larger sizes, please contact a Esareka representative. The design is suitable for square, rectangular or round applications. Because of its stainless steel construction, the SERIES 10 has high corrosion and erosion resistance, and can be operated for many years with a minimum maintenance. Stainless steel provides virtually limitless design flexibility. The result is a lighter weight and easier-to-install gate.


Wall mounted

Flange Back Frame

The stainless steel frame on the SERIES 10 is a flange back type (Detail A) available in open or self-contained configurations, providing a solid one-piece gate. The rigidity provided by the flange back frame makes it easier to handle in transportation and installation with less risk of distortion. The seal bolting is completely separated from the flange anchoring, allowing the flange to be modified to better suit all particular applications. This feature also allows the gate to be completely factory assembled as well as tested for operation and leakage before being shipped. It also eliminates any on-site assembly and adjustments.

Reinforce Slide

The slide is a stainless steel plate reinforced with members welded to the plate, making it a solid single piece.

Channel mounted 

Stop Log frame and door plate are constructed from stainless steel, The door plate may be plain, or reinorced with stiffeners to give rigidity required.

Three (3) sides sealed with synthetic rubber and with flush level invert. 

Door plate guided with low friction material, UHMWPE for long life and ease of operation.


Product specification and performance

There are number of penstock/sluice gate frames constructed from stainless steel pressed channel and MIG welded to give required rigidity for the design sealing duty.Yokes are removable for maintenance puerpose.and wall or channel mounting bracket are incorporated,these can be omitted for rebate fixed valves.

Penstock/sluice gate doors are contructed staainless steel plate,reinfoced with a welded box section matrix to give the rigidity required, The gate may be plain or reinforced with an angle or box section frame according duty.

Spindle are machine from stainless steel, with a single start full ACME thread (double start thread depending on design requirement) this is the optimun thread form for ease of operation, long life, and prevention ragging, Both rising adn non-rising option are available.

Penstock/Sluice Gate seals are full face, and re manufactured from low friction mterial for long life and ease of operation,thus smaller actuators can frequently be specificied for fabricated penstock compared to cast iron valves of similar size.All fabricated penstocks use a flush invert type seals, and on channel and weir penstocks the soffit seal is omitted as standard.

Small (less than 900mm sq),medium (900mm sq to 1400mm sq) and large (over 1400mm sq) penstock ranges are available, with square or rectangular openings.These accommodate heads upt to 8m or off seal as standard, conforming fully to BS7775 with respect to leakage rates.Penstocks can be designed for higher duties (please contact us for more information) And for sizes above 1000mm x 1000mm differenct modes of operation available, althought the standard requirements is either handwheel or protection cap (for tee key operation)


Product performance

Penstock/sluice gates shall be substantially watertight under the design head condition.Under the design seating head, the leakage shall not exceed 0.60 l/min per meter of seating perimeter.Under the design unseating head, the leakage heads 6m or less shall not exceed 1.25 l/min per meter of perimeter.For unseating heads greater than 6m, the allowable leakage shall not exceed the rate per meter of perimeter specified by the following equations:


Materials specification


Exploded View




Headstock cone comes with variety of formats.Depending on the user's requirment, special custom- desgned headstock or gate opening mechanisms can also be manufcaturer that includind electric actuated,pnuematic/hydraulic actuated, manual geared and direct with/without indicator 


Stem guides

Stem guides are provided as required to support the stem from buckling. The stem guide are designed as per AWWA/BS7775 standards. Stem guide bracket are fabricated from Stainless steel Gr304 ( Gr316 optional).

Headstock bracket


Headstock wall bracket are used to support headstock or extension spindle.When no concrete structure on suitable floor exist in the operation area.Manufactured in cast iron/mild steel/stainless steel the bracket are designed to withstand all normal operating loads.


Muff coupler 

Manufactured in stainless steel Gr304/316 or cast iron for jointing straight lengths of spindle in-line.For use with axial and torsion loads (rising and non-rising spindle application)

Two type of coupling are available:-

1. Plain muff coupling  2. screwed muff coupling

The use of particular type of coupling will depends upon the duty and the specification 


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