Penstocks
The world of penstocks can be confusing, but it can be broken down to a few items
On-Seating / Off-seating
On-Seating: The pressure pushes the door onto the seal
Off-Seating: The pressure pushes door off the seal.
Or does it do both? Bi-direcitonal
Operaiton
Non rising stems: Rotate through a nut in the penstock door. The screwed portion of the stem at the bottom is probably immersed in the water, effluent etc.
Rising stems: Are connected to the penstock door and work through a revolving nut located in the operating gear. The screw thread at the top of the stem is generally not immersed and is readily accessible for maintenance.
Frame
Full Frame: used where thrust reaction is accommodated by the penstock frame.
Open Frame: used where thrust reaction is accommodated by the mounting structure.
Materials
The environment and budget will generally dictate the material however the following are available:
Stainless Steel 304: the most cost-effective option which has good resistance to environmental and chemical corrosion. Available in all our standard penstocks
Stainless Steel 316: has better resistance to environmental and chemical corrosion. Available across all our standard penstocks upon request.
Super Duplex: has excellent resistance to environmental and chemical corrosion, particularly when hydrogen sulphide is present. Available in our bespoke range when the specification justifies the cost.
Mounting
Wall Mounted: The penstock is mounted to the wall using mechanical anchors from the frame.
Channel mounted: The penstock Tare fixed into preformed rebates in the sides and inverts of channels by means of a sand/cement non shrink grout.
Bespoke Penstock Solutions
When the standard range just won't do you’ve come to the right place.
The core of our business is the design and manufacturer of penstocks for the harshest environments to the most exacting standards.
Having delivered projects in the UK, UAE, Qatar, Sudi Arabia. We know what it takes to satisfy even the most challenging brief.
Costs and timelines in these projects will be based on the specification.
Operating head: limited only by you budget.
Delivery = 8 weeks +
Wall Mounted Penstocks
Size: 150 to 3000 mm
Maximum operating head: 9 m
International Penstocks Lab. design and manufacture two ranges of wall mounted penstocks from 150 to 3000 mm.
Our penstocks are manufactured in stainless steel grades 1.4301 (304) or 1.4401 (316).
CF Range:
- Robust construction for wall bolting.
- Suitable for four side sealing.
- On/off seating pressure ranges from up to 6 m.
- Supplied with a non rising stem
- Suitable for manual and automatic actuation systems.
- Size range 150 to 1500 mm.
FS Range:
- Very robust construction for wall bolting.
- Suitable for four side sealing.
- On/off seating pressure ranges from up to 9 m.
- Supplied with a rising stem
- Suitable for manual and automatic actuation systems.
- Size range 150 to 3000mm.
Wall mounted penstocks are suitable for water and wastewater application.
Delivery: 6 weeks
Channel Mounted Penstock
Size: 150 to 3000 mm
Maximum operating head: 9 m
International Penstocks Lab. design and manufacture two ranges of channel and side wall mounted penstocks from 150 to 3000 mm.
Our penstocks are manufactured in stainless steel grades 1.4301 (304) or 1.4401 (316).
CF Range:
- Robust construction for channel mounting.
- Suitable for four side sealing.
- On/off seating pressure ranges from up to 6 m.
- Supplied with a non rising stem
- Suitable for manual and automatic actuation systems.
- Size range 150 to 1500 mm.
FS Range:
- Very robust construction for channel mounting.
- Suitable for four side sealing.
- On/off seating pressure ranges from up to 9 m.
- Supplied with a rising stem
- Suitable for manual and automatic actuation systems.
- Size range 150 to 3000mm.
Channel mounted penstocks are suitable for water and wastewater application.
Delivery: 6 weeks
Weir Penstock
Size: 150 to 3000 mm
Maximum operating head: door depth pressure
International Penstocks Lab. design and manufacture two ranges of weir penstocks from 150 to 4000 mm supplied as wall mounted open frame as standard.
Our penstocks are manufactured in stainless steel grades 1.4301 (304) or 1.4401 (316).
CF Range:
- Robust construction for wall bolting.
- Suitable for three side sealing.
- On/off seating pressure ranges from up to 6 m.
- Supplied with a non rising stem
- Suitable for manual and automatic actuation systems.
- Size range 150 to 2000 mm.
FS Range:
- Very Robust construction for wall bolting.
- Suitable for three side sealing.
- On/off seating pressure ranges from up to 9 m.
- Supplied with a rising stem
- Suitable for manual and automatic actuation systems.
- Size range 150 to 4000mm.
Channel mounted penstocks are suitable for water, wastewater and flow contril application.
Delivery: 6 weeks
Handstop
Size: 150 to 700 mm
Maximum operating head: 3 m
International Penstocks Lab. handstop gates are simple, manually operated valve for small dimensions and low pressures.
Manufactured as standard in HDPE available in sizes from 150 to 700 mm, above which size a penstock is a more appropriate solution.
HF Range:
- Rugged construction for wall bolting.
- Suitable for three side sealing.
- On/off seating pressure ranges from up to 3 m.
- Suitable for manual operaiton.
- Size range 150 to 700 mm.
Delivery : 4 weeks
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