9681 Series Filter Assemblies

Notes and Specifications
Filter Housing

• Fatigue Pressure Rating:
  275 bar (4000 psi) per NFPA T2.6.1 R2-2001 Cat C/90
• Typical Burst Pressure:
  1,260 bar (18,000 psi)
• Filter Element Collapse Pressure:
  207 bard (3000 psid)
• Fluid Compatibility:
  Compatible with all petroleum oils and most water glycols, water-oil emulsions, and synthetic hydraulic and lubricating fluids
• Temperature Range:
  -43˚ C to 107˚ C (-45˚ F to 225˚ F) – Nitrile seals
  -29˚ C to 120˚ C (-20˚ F to 225˚ F) – Fluorocarbon seals
  60˚ C (140˚ F) maximum in HWCF or water glycols
• Bypass Valve Setting:
  Non-bypass
• Indicator Pressure Setting:
  7 bard (100 psid)
• Housing Materials of Construction:
  Ductile iron head; steel bowl

Dimensional Drawing

Dimensions in mm (inches)

Pressure Drop Information

Housing pressure drop using fluid with 0.9 S.G.

Housing pressure drop is directly proportional to specific gravity.

Element Pressure Drop

Multiply actual flow rate times factor in table below to determine pressure drop with fluid at 32 cSt (150 SUS), 0.9 S.G. Correct for other fluids by multiplying new viscosity in cSt/32 (SUS/150) x new S.G./0.9.

9601 Series Element
DP Factors (psid/gpm)

Length	CP	CT
8”	0.52	0.12
13”	0.32	0.08
16”	0.25	0.07

Housings, Vessels, or Assemblies

For new installations, select one complete part number from each section below

Section 1 Housing P/N:

Note: Pall filter housings are supplied without filter elements or filter change out warning devices. Never operate the filter housing unless a filter element is fitted and all warning device ports are sealed.

Housing part number designates indicator port is fitted with a plastic shipping plug.

Part Number	Part Number
HH9681C20SW1	HZ9681C20UW1
HH9681C20TW1	HZ9681C24TW1
HH9681C24SW1	HZ9681G20UW1
HH9681C24UW1	HZ9681K20SW1
HH9681G20SW1	HZ9681K20TW1
HH9681K20TW1	HZ9681S20SW1
HH9681K20UW1	HZ9681S20TW1
HH9681S20SW1
HH9681S20TW1
HH9681S20UW1

Part Number (Description) Breakdown

HH = housing with nitrile seals

HZ = housing with fluorocarbon seals

9681 = 9681 Series housing

C20 = 1¼” BSP ISO 228 threads

C24 = 1½” BSP ISO 228 threads

G20 = 1¼” ISO 6162 split flange ports (400 bar/5800 psi max pressure)

K20 = 1¼” Top Manifold Mount

S20 = 1¼” Side Manifold Mount

S = 8” nominal length

T = 13” nominal length

U = 16” nominal length

W = Non-bypass

1 = 1 indicator warning device port

Section 2 Differential Pressure Indicator

HC9601 F [Table 1] [Table 2] Z Table 1:
Filter Performance Ratings

Code	ßx(c) ≥1000 per ISO 16889
CP	5
CT	15

Table 2:
Length Options

Code	Description
8	8” nominal length
13	13” nominal length
16	16” nominal length

Section 3 Differential Pressure Indicator

P/N: RC [Table 3] Z 097 Z [Table 4]

Note: If no Differential Pressure Indicator is selected, ‘B’ type blanking plug (P/N HC9000A104Z) must be ordered separately and fitted to replace the shipping plug.

Note: Z indicates fluorocarbon seals are standard. Other options are available; contact Pall.

Table 3: Indicator Options

Code	Brass Option Indicator
A218M	Electrical switch (SPDT) with Hirschmann connector
A218R	Electrical switch (SPDT) with Hirschmann connector with Red and Green LED indicators
A219D	Visual indicator

Code	Stainless Steel Option Indicator
778N	Visual filter with thermal lockout
861C	Electrical switch (SPDT) with Hirschmann connector
771B	Electrical switch (SPDT) with 3-pin

Table 4: Differential Pressure Indicator Material

Code	Description
Omit	If Brass Indicator is selected in Table 3
SS	If Stainless Steel Indicator is selected in Table 3 (recommended for high pressure applications with pressure > 200 bar (3000 psi)