Vickers PVH74 Variable Piston Pump: Specs, Model Code & Rebuild Parts

Vickers PVH74 (Eaton / Danfoss) is a variable-displacement, pressure-compensated axial-piston pump built for quiet industrial service — 73.7 cm³/r (4.5 in³/r) displacement, rated to 250 bar (3,625 psi). If you are staring at a nameplate like PVH74QIC-RSF-1S-10-C25-31 trying to figure out what you have and which seal kit fits, this page decodes every character, lists the specs, and links the exact in-stock rebuild parts.

Decode your PVH74 model number

Read the code left to right. Example: PVH 74 Q I C - R S F - 1S - 10 - C25 - 31

Position	Code	What it means
Series	PVH	Variable-displacement piston pump, H (high-performance) series
Size	74	Max geometric displacement 73.7 cm³/r (4.5 in³/r)
Design	Q	Quiet design for industrial applications
Control	I	Industrial control, 20 bar differential setting
Compensator	C	Pressure compensator, 70–250 bar adjustment range
Rotation	R	Right-hand (clockwise) rotation viewed at the shaft end (L = left/CCW)
Shaft seal	S	Single, one-way shaft seal (D = double/dual shaft seal)
Ports	F	SAE 4-bolt flange ports
Shaft	1S	SAE “C” straight keyed shaft (SAE J744-32-1)
Pressure setting	10	Factory pressure setting 100 bar (1,450 psi)
Comp. range	C25	70–250 bar (1,015–3,625 psi) compensator, factory-set 250 bar
Design no.	31	C, CM, C**V or IC control design series

Single or dual shaft seal — how to tell

The 10th character of the code answers it directly. An S in that position means a single (one-way) shaft seal; a D means a double/dual shaft seal (used when the pump case can see pressure or when a back-up seal is required). So a PVH74QIC-RSF-1S-10-C25-31 is a single shaft seal pump. If your code reads …-RDF-… you have the dual-seal build and need the double-seal service parts. When in doubt, pull the shaft-end cover: one lip seal riding the shaft = single; two seals with a drain between them = dual.

PVH74 specifications

Max geometric displacement	73.7 cm³/r (4.5 in³/r)
Rated pressure	250 bar (3,625 psi)
Rated speed	1,800 r/min (zero inlet); 1,500 r/min at 127 mm Hg
Shaft	SAE “C” straight keyed (code 1S)
Mounting	SAE “C” 4-bolt flange
Ports	SAE 4-bolt flange, side ported
Control	Pressure compensated, adjustable 70–250 bar
Interchange family	PVH74 / PVH81 share the 02-102262 seal kit

Common PVH74 problems — and the parts that fix them

• Oil weeping at the shaft: worn shaft seal — replace the shaft seal (589332).
• External leaks at the end cap / ports: hardened O-rings and gaskets — install the full seal kit (02-102262).
• Slow to build pressure / won’t hold compensator setting: worn control piston or compensator seals — seal kit plus compensator inspection.
• Noise / cavitation at start-up: check inlet, then the case-to-inlet check valve and seals.

PVH74 rebuild parts & seal kits — in stock, ship today

Not sure it’s a PVH74? Browse the full Vickers PVH piston-pump catalog or the complete Eaton / Vickers parts & seal-kit hub.

Frequently asked questions

Is the PVH74QIC-RSF-1S-10-C25-31 a single or dual shaft seal pump?

Single. The “S” in the 10th position of the code specifies a single, one-way shaft seal. A “D” there would indicate a double/dual shaft seal.

What seal kit fits a Vickers PVH74?

The Vickers 02-102262 seal kit covers both the PVH74 and PVH81. For a leaking shaft specifically, use shaft seal 589332.

What is the displacement and pressure rating of a PVH74?

73.7 cm³/r (4.5 in³/r) maximum displacement, rated to 250 bar (3,625 psi), at speeds up to 1,800 r/min.

Are PVH74 and PVH81 parts interchangeable?

They share the same seal kit (02-102262) and many service parts because they use the same frame; always confirm against your full model code.