Change over Electronics SD6 to SD7

 SD6 to SD7 Overview

Amplifier and controller sub-assembly

The family of the digital amplifiers is complemented with a module by the digital amplifier module SD7, which is distinguished by its compact construction and by an excellent price- performance ratio.

Click on link for the change over from SD6 to SD7 spreadsheet: Change over from SD6 to SD7

Click to review the PDF document on the differences between SD6 & SD7: Differences between SD6 & SD7


Standalone DSV Controller with CANopen – DSV342D2-1AC

As a new feature, we’ve created a “Fact Sheet” which are meant to give an overview on specialties and denomination/explanation of M-numbers etc.

Please click on link to upload word document:  DSV342D2-1AC_FactSheet

Special Type Standalone DSV Controller – DSV341D212AA-M169/239

As a new feature, we’ve created a “Fact Sheet” which are meant to give an overview on specialties and denomination/explanation of M-numbers etc.

Please click on link to upload word document:   DSV341D212AA-M169_M239 fact sheet

Special Type Mobile Coil DSV Controller – ME35/19×50-P1-24A1R2-M239

As a new feature, we’ve created a “Fact Sheet” which are meant to give an overview on specialties and denomination/explanation of M-numbers etc.

Please click on link to upload word document:   ME35_19x50-P1-24A1R2-M239_FactSheet

Automatic Pressure Cycling for mounting in a Down Hole Drilling Rod

Automatic Pressure Cycling Valve for mounting in a Down Hole Drilling rod that is located long distance from the main pressure pumping sources. Auto Cycling Valve

We have recently developed a new modification for the AQ4Z60-2100-Auto Cycling Valve that should greatly increase the market for it.  We have added to the design so that it is a round non-subplate version mounted directly in the tube and ported with SAE-4 straight thread and O ring sealed ports.

The whole assembly will fit within a 2.89“ I.D. oil drilling rod, and thus can control the drill bit and rod units with very few hose and fittings required.

This will greatly reduce the Driller’s hose coasts, and speed up hose handling and replacement tasks.  There may also be other uses for this valve where mounting space is limited or where sub-plate mounting is not required but direct porting and SAE threads are.

Maximum working pressure is 210 bar at 2 GPM. For more information please contact Wandfluh at 847-566-5700.



Wandfluh of America can supply ported housings for both types of cartridges offered.  Prices and drawings are readily available from the Wandfluh of America sales office. Ask for model code sheets on both styles.

For drop-in poppet cartridges refer to Catalog Section 1.11 which provides individual data sheets for the various styles of 2 way normally closed or normally open poppet cartridges, and also data pages on various complete valve assemblies with poppet type cartridges installed. Then, also refer to Catalog Section 2-13, which provides standard cavity drawings for the various type and sizes of poppet cartridges offered. 

For screw-in cartridges refer to Catalog Sections 1.11; 2.12.2; 2.3; 2.4; 2.5; 2.6; and 2.7 for specific valve data pages, and also Catalog Section 2.13 for specific cavity drawings.

Both types are offered as standard with 6061 aluminum material for 3500 psi service and SAE straight thread or NPT ports. Both types can be quoted on special option with NPT or BSPP ports.  Both styles can also be quoted on l option with steel material,  stainless steel material or QC7 Hi-Strength aluminum material for 5000 psi service; however, minimum quantity orders are required.

Ed V. Askey

Model MVPPM42-275–G24-W, High Capacity Proportional Pressure Reducing-Relieving Cartridge,with metric 42 x 2 mm threads

Please see Data Page 2.3-690E for Model MVPPM42-275-G24 – proportional pressure reducing-relieving screw-in cartridge valve, It is rated to 66 GPM and 5000 psi, and is the fore runner of a series of new 42MM screw-in cartridge valves. This valve was developed for torque and speed control of large fluid motors that drive the propellers on ROV’s and other fluid motor driven craft and vehicles, or the steering booster pumps on service and supply barges and large yachts.
This particular model calls for maximum pressure adjustment to 275 bar, with dual flying solenoid leads and external pressure balanced coil enclosure, but all Wandfluh standard connections and coil housings can be supplied, as well as adjustable  pressure ranges from 20 bar to 350 bar.  Originally rated to 250 liters per minute, our customers have found it readily handles to 280 liters per minute at 275 bar. We can provide it with explosion proof solenoids meeting ATEX/PTB EN norm/CE standards, if required.  Presentation Dwgs and certs zfor the required model numbers can be supplied on request.

We have an increased order rate, and are receiving orders from firms interested in using this valve on other high flow rate applications where NG25 (D08) components such as sub-plate mounted directional valves are used, and thus we have developed a NG25 (D08) pad mount stacking sandwich which includes the screw-in cartridge. 

The complete assembly model description is MVPSA25-P-350 -G24 with ISO electrical connector. 

Ed Askey

April 2013 – OEM Off-Highway Advertisement

April OEM

ISO Screw-in Cartridge Style, Pressure Compensated Flow Control Valves. Models QZDPM22-40; QZDPM33-70. Manually Adjustable.

Refer to data sheets 2.5-535E, and 2.5-550E

These highly precise and repeatable flow control valves offer the following features and advantages:
1.    Full pressure compensation over the selected pressure differential range.
2.    Adjustable over the full min to max flow rating.  
3.    Working Pressure to 350 bar.(5100 psi).
4.    Choice of stem, knob, or key lock adjustment
5.    Linear flow adjustment vs stem/knob turns.
6.    QZDPM22 accurately adjusts down to 0.02 li/min; QZDPM33 accurately  adjusts down to 0.2 li/min.
7.    Exposed surface of adjustment case is Zinc plated. Aluminum knob is clear anodized.
8.    Standard Seals are Buna N, (Viton or EPR seals optional).
9.    Can be provided with external surfaces of stainless steel
Fits ISO standard 2 port flow control valves M22 x 1.5 and M33 x 2 threaded cavities.  Thus, also interchangeable with Wandfluh proportional flow control and throttle valve cartridges M22 x 1.5 and M33 x 2.

Ed V. Askey


Most Wandfluh standard control valves can be provided with a selection of options to protect the valve external materials from damaging ambient conditions, such as rain, sleet, snow, saltwater spray or immersion, and chronic humidity (both indoors and outdoors).
Some equipment and machines face only occasional and mild exposure, some face almost constant and severe exposure; thus, the degree of protection needed can vary. Wandfluh offers 3 options for corrosion protection of external parts that can be applied to almost all product types and models.

Ask for our brochure that briefly describes these options and what processes and material finishes are used on options K1, K4, and K9 (these option numbers are added to the end of the standard model number).  K1 is intended to protect against chronic humidity, infrequent light rain or salt spray, infrequent sleet or snow.  K4 protects against constant but light moisture exposure, rain storms and light salt spray, and is often recommended for most mobile equipment applications where the machines are constantly used out doors.  K9 features all external components of stainless material, with bodies, end caps, and sub plates of type 316L stainless, and solenoid housings are plated and epoxy coated.  K9 is required on all salt water exposure applications, constant and heavy rain and snow storms, and temporary immersion.
Type 316L is the usual specification for undersea research equipment, off shore drilling operations, above deck shipboard equipment, where ever salt water exposure is constant

Some valves can be quoted for working in corrosion and hazard environments using special materials such as 300 series stainless, 17-4 Carpenter stainless and improved surface treatments. These usually do require minimum order quantities for production.

Ed Askey